The summer before college Luca Piccone returns to Copper Cove, the idyllic campsite he and his closest friends have visited every year since they were kids. To Luca, Copper Cove is like the setting of the fantasy movies he loves, a sanctuary, protected from the dangers of the outside world, where nothing goes wrong and everything stays the same.

But this year things are changing.

Desperate to make this summer the best one yet, Luca tries to ignore the freshly torn rifts within his tight friend group, the pangs of unrequited love, the anxiety attacks he thought he'd left back at school, and the shadows at the edge of the forest threatening to break free. Until he learns the terrible truth.

Every generation the children of four families are bound by a pact. A pact designed to keep the camp pristine and the monstrous force lurking beneath the campsite imprisoned. But in order to do this, an unthinkable price must be paid--a price that has soaked the previous generations in blood. Can Luca keep his friends, and his favorite place, from being ripped apart?

By the end of the summer, only one thing is for certain: Copper Cove will never be the same again.