She's the woman of his dreams. He's the monster from her nightmares.

When Daniella rescues elderly Peggy from a mugger on a Boston street, she expects nothing in return. But then she meets Peggy's son, Lucas—devastatingly handsome and utterly captivating. Unlike her distant husband Grant, Lucas sees her. Wants her.

Daniella can't resist, and they spend one reckless night together—which she immediately regrets.

Too late, because Lucas doesn't just want Daniella. He needs her. And he's willing to destroy everything—and everyone—standing in his way.

Lucas plays the long game, worming his way into Daniella's life—befriending Grant, charming her twin daughters, and inveigling his way into her family. Every time she turns around, he seems to be there.

As the depths of his obsession become clear, Daniella realizes she's in a fight for her life. Because the family she tried to help is hiding something dark. Something deadly. And she's already in too deep to escape.