Last summer, Sara Ellis was found dead by the lake, and only Mandy knows what really happened.

This summer, she's desperate to keep it a secret.

For a few weeks every summer, Sara was Mandy's best friend. At Highmark, the lake resort where their families vacationed, the two were in a world of their own. Or at least Mandy got to be part of Sara's world.

But now Sara's dead. The police ruled her death an accident; a tragic mistake after a night of impaired judgment. For the past year, Mandy's coped by escaping: leaving home and barely keeping it together at school. The last thing she wants to do is return to Highmark this summer—even if she does need "closure." As soon as she's back, though, she hears the whispers: someone killed Sara Ellis.

And if she's not careful, they'll figure out it's all her fault.

As evidence resurfaces and anonymous accusations are scrawled in angry red spray paint, Mandy must confront the truths she's been avoiding about last summer. Because someone wants to make her pay for what happened to Sara that night.