Over the centuries, Mason has perfected his anonymous teenage playboy persona. He teeters on the edge between manic joyriding and self-destruction, chasing the highs of rollercoasters, half pipes, and anonymous sex to stave off his guilt, and keep him neutral.

He's jarred out of his ecstasy-filled neutrality when Rosaline, his beautifully evil sire, drops in, promising a new savage playground. She's good at digging her hooks into him, dragging him back into her thrall, and pulling the monster back out of him. He's terrified that if he falls to her prowess this time, he won't crawl back out, yet he's never seen the point of hiding from her.

But then he meets Jaimie, whose resilience and determination to protect her gifted younger brother stirs Mason's damaged heartstrings and calms him in ways he hasn't known since he was mortal. He's hooked.

Thinking it's the last place Rosaline would look for him, and that it's a chance to feel like a kid for the first time, he infiltrates Jaimie's high school. Within its halls, he finds acceptance among his human peers, and he revels in tormenting Jaimie's bullies. In Jaimie he finds friendship, family, and a path to redemption he's never hoped for before.

Can this girl and her kid brother heal over a century's worth of grief, and redeem him? Can he keep them all safe from Rosaline's destruction? Or will he fail, like he fails at everything?