Lark’s Deadly Double Life

Lark Montague has built her life around contradictions. To the outside world, she is a successful singer from the wealthy Montague family. Secretly, she is also a vigilante serial killer—or, as she prefers to call herself, a “multiple deleter”—who hunts abusive men and sexual predators. Rather than killing indiscriminately, she carefully chooses victims she believes deserve to die, convinced she’s protecting future victims from suffering.

The story begins on Halloween when one of those missions goes spectacularly wrong. Lark lures her abusive ex-boyfriend, Andrew, into a trap and kills him using a barrage of fireworks. Before she can fully clean up the scene, she encounters another predator, Jamie Merrick, a teacher known for preying on young girls. Unable to ignore the opportunity, she chases him and deliberately drives him into a reservoir, killing him as well.

Now facing two crime scenes instead of one, Lark calls Leviathan, an elite criminal cleanup organization her stepfather’s criminal empire has occasionally employed. The job brings Lachlan Kane, one of Leviathan’s best contract killers, and his partner Conor to the scene.

The meeting is an immediate disaster. Hidden behind a mask, Lachlan assumes Lark is an incompetent civilian who has gotten herself into trouble. He dismisses everything she says, wrongly concludes she’s suffering from a concussion, and refuses to believe she’s perfectly capable of handling herself. To make matters worse, he forcibly stuffs her into the trunk of his beloved vintage car so Leviathan can quietly relocate her.

Unfortunately for him, Lark refuses to play the helpless victim. Using a guitar whammy bar she’d hidden on herself, she pries open the trunk, escapes, and disappears before anyone realizes she’s gone. The humiliating incident becomes legendary within Leviathan and costs the organization a lucrative contract with Lark’s stepfather, Damian Covaci, leaving Lachlan furious with the mysterious woman who outsmarted him.

A Marriage Neither of Them Wants

Nearly a year passes before fate throws them together again.

Lachlan is desperate to leave Leviathan, but his employer, Leander Mayes, refuses to let him retire. Leander rules through cruelty and intimidation, casually torturing people who disappoint him with grotesque punishments like forcing victims to drink “pizza smoothies” blended with human teeth. One unfortunate victim, Robbie Usher, becomes another example of Leander’s brutality. The failed cleanup involving Lark has left Lachlan indebted to Leviathan, making escape impossible.

Meanwhile, Lark attends a celebration for Rowan Kane and Sloane Sutherland, who recently married after surviving the events of the previous novel. Neither Lark nor Lachlan realizes the other will be there.

Their reunion starts with undeniable attraction. Sparks fly during a heated encounter on a balcony before they recognize each other as the enemies from the infamous trunk incident. Their chemistry immediately transforms into furious arguing, with both convinced the other is insufferable.

Soon afterward, Lark accidentally overhears Damian and his trusted enforcer, Stan Tremblay, discussing a disturbing pattern of murders targeting people connected to their criminal organizations. Victims are dying roughly every forty days, and the evidence points suspiciously toward the Kane brothers.

If Damian concludes Rowan and Lachlan are responsible, he will almost certainly order them killed. That would also destroy Sloane, who has finally found happiness with Rowan.

Lark’s sharp-witted great-aunt, Ethel Montague, realizes only one solution can prevent a bloody war between the families. She pressures Lark into approaching Lachlan with an outrageous proposal.

Lark suggests they enter a marriage of convenience. By becoming legally married, Lachlan gains a permanent alibi tying him to the Montague family, while Leviathan regains its lost business relationship through new contracts with the family’s enormously successful muffin empire. In exchange, Lachlan agrees to help Lark uncover whoever is actually committing the murders.

Neither of them likes the arrangement, but both understand it’s the best chance of preventing even greater violence.

They marry quietly at City Hall with only a handful of witnesses, including a delighted Ethel and the skeptical Rowan and Sloane, who suspect the marriage could end in disaster.

Learning Each Other’s Secrets

Sharing a home forces the newlyweds to lower their defenses.

Lachlan quickly discovers that Lark is hiding far more than she initially admitted. He stumbles across her collection of gruesome trophies, including a severed finger preserved inside a snow globe. Instead of being horrified, he realizes she has been living the same double life he has—she simply chooses different targets.

Rather than driving them apart, the revelation creates unexpected trust. For the first time, each has found someone who understands exactly what it means to live with blood on their hands.

Together they begin investigating the mysterious killings threatening both families. Their search takes another dark turn when Stan Tremblay himself becomes one of the victims.

Stan’s death leaves behind one major obstacle: the biometric security protecting his home and files. To gain access, Lark and Lachlan stage an elaborate break-in at the medical examiner’s office during a fire drill. While the building is evacuated, they steal Stan’s severed thumb and one of his eyes so they can fool the fingerprint and retinal scanners guarding his property.

The investigation steadily draws them closer emotionally as well.

Lark finally shares one of the deepest wounds of her past. As a child, she survived a violent home invasion during which her biological father, Sam, was murdered. The trauma left her with severe claustrophobia and a terror of being trapped inside small, dark spaces. It’s one of the few fears she has never been able to conquer.

Lachlan, who rarely expresses affection openly, responds in his own brutal way.

He kidnaps Dr. Louis Campbell, the former headmaster of Ashborne boarding school, where both Lark and Sloane suffered abuse as children. Campbell ignored repeated warnings and failed to protect them, allowing the abuse to continue unchecked.

Rather than killing him immediately, Lark forces Campbell to experience the terror he ignored for years. She sews his lips shut with gold thread before finally executing him, giving herself a measure of closure for the adults who failed her.

The Real Killer Reveals Himself

As more pieces fall into place, Lark and Lachlan discover they’ve been chasing the wrong suspects all along.

The mastermind behind the murders is Abe Midus, whose real name is Abe Mead. He is the brother of Harvey Mead, one of the killers Rowan and Sloane eliminated during the previous book. Determined to avenge Harvey’s death, Abe has carefully orchestrated an elaborate revenge campaign against everyone connected to the Kane and Montague families.

His revenge escalates dramatically.

Abe infiltrates Ethel’s nursing home and murders her with a lethal injection, devastating Lark. Ethel had been far more than a relative—she had been Lark’s strongest supporter and the person who orchestrated the marriage that ultimately brought Lark and Lachlan together.

Abe then attacks even more personally by kidnapping Lark after seriously injuring her beloved dog, Bentley.

Knowing about Lark’s childhood trauma, Abe traps her inside a massive industrial rotary batch oven, leaving her to slowly burn alive.

He simultaneously rigs a bomb beneath Rowan and Sloane’s vehicle before confronting Lachlan with an impossible decision.

Lachlan can either rescue his wife before she’s incinerated or save his brother and sister-in-law from the explosion.

Abe expects the impossible choice to destroy him.

Inside the oven, Lark realizes there isn’t enough time to save everyone. Refusing to let Rowan die because of her, she orders Lachlan to save his brother instead.

Choosing Each Other

Just when everything appears hopeless, unexpected help arrives.

Rose, the fearless circus performer who has become a close friend of the Kane family, races to the scene alongside Fionn Kane, Lachlan’s younger brother and a doctor.

While Fionn coordinates the rescue efforts, Rose creates the opening Lachlan desperately needs by shooting out the oven’s reinforced viewing window. The distraction allows Lachlan to reach Lark before the heat kills her.

With Lark finally safe, Lachlan turns all of his attention toward Abe.

The confrontation ends with Lachlan killing him once and for all, bringing the cycle of revenge to an end.

Although Abe is dead, the ordeal changes everyone’s future.

Lachlan finally gains the freedom he’s wanted for years by officially retiring from Leviathan. Thanks to Lark’s negotiations, Leander receives an enormously profitable contract serving both the Covaci and Montague organizations, giving him little reason to keep Lachlan trapped in his employ.

At the same time, Fionn and Rose, whose bond strengthened during the rescue, begin exploring a romantic relationship while Rose recovers from the injuries she suffered helping save Lark.

Before leaving their old lives behind, Lachlan gives Lark one final gift that perfectly reflects who they are. He presents her with Dr. Campbell’s heart, preserved forever inside a block of resin as a permanent trophy.

Then he offers her something even more meaningful.

Rather than assuming their marriage should continue, he hands Lark divorce papers, making it clear that she owes him nothing. Their marriage began as a bargain, and if she wants a fresh start, he’ll let her walk away.

Lark doesn’t hesitate.

Instead of signing the papers, she tears them apart. What began as a fake marriage built on necessity has become a genuine partnership between two people who understand every dark corner of each other’s lives.

With their enemies defeated, their families finally at peace, and no reason to keep pretending, Lark and Lachlan leave together for a real honeymoon in Indonesia—this time not as reluctant allies, but as husband and wife by choice.