Where'd all the Time Go?

It's Summer in the 90's at last, and the parents of Madeline Cullen and her older brother Lachlan make the usual decision to register both teenagers in a 30-day wilderness camp for the summer. The teens are more than unsatisfied to not be able to spend their entire summer however they'd like, but things soon get interesting as a young member of the camp suddenly goes missing and is found rotting under a pile of leaves, in which the event goes viral within their small town. Who goes missing next?