Piper Sullivan never should have been at Suicide Point the day she fell. Her older sister, Savannah, knows this with all her heart — just as she knows that Piper's 'accident' was entirely her fault. Savannah did something awful, something she can barely stand to think about, and now Piper is in a coma.

But just as Savannah's guilt threatens to swallow her whole, she finds something strange in Piper's locker: a note inviting Piper to a meeting of their school's wilderness club...at the very place and on the very day she fell. Which means that there's a chance that Piper wasn't alone.

Maybe it isn't Savannah's fault, after all. Someone in the club might know what really happened. Someone might have done something. But why? If Savannah wants to find out the truth about what happened to Piper, she'll have to join the club on their weekend long camping trip...on the very same mountain where her sister fell. And with everyone in the club a suspect, she'll need to be careful or she might follow her sister into the dark.