She never imagined falling for a man whose real face she'd never seen.

Three years ago, Kimmy's life was shattered by a heinous act that left her traumatized. Now, every day is a living hell as she struggles to reclaim her life. But when Kimmy learns she can purchase retribution through illicit channels, she decides to give it a shot.

Operative Seven is a calculating enforcer for the mysterious Bureau. He—for the right price—metes out punishment to those who have evaded justice. Coldly efficient, Seven has been tasked with pursuing and settling accounts with three influential men—the very ones Kimmy seeks to destroy.

Though the client and the operative are not allowed to cross paths, fate intervenes, and soon Kimmy finds herself drawn to the stranger, who conceals his identity.

As Kimmy’s world collides with Seven's, a fragile bond begins to form between them. Kimmy knows nothing of Seven's true self, only that she feels safe in his presence. And for Seven, the icy control he's always maintained is slowly slipping away, replaced by an all-consuming desire for the woman he shouldn't want.

However, their tenuous alliance is complicated by the approach of their most powerful target. Now that Kimmy and Seven are facing a dangerous enemy, they are forced to confront the inevitable question: how far are they willing to go to see their revenge through to the end?