When everyone's a werewolf, it's hard to spot the monster...

Thirteen-year-old Sel lives in the remote, isolated town of Tremorglade, where nothing interesting ever seems to happen. Well, unless you count the one night a month when the full moon rises and kids like him must lock up their parents while they transform into werewolves (though Tremorgladers prefer to call them Rippers). But that's the whole world's new normal since the Disruption changed everything well before Sel was born.

But when strange things begin happening in Tremorglade, like drones emitting sickening sounds and people behaving oddly, Sel and his friends begin asking questions about what's really going on in their small town. And suspiciously soon after they do, Rippers begin escaping on confinement nights, people start disappearing, and the kids suspect they're being followed.

Maybe there's a reason no one ever seems to leave Tremorglade...and it's up to Sel and his friends to figure out the truth someone doesn't want them to know before another full moon puts them all at a bite risk.