Agroupof20somethingswanttoendthesummeronahigh,theytaketheadvicefromagirltheymetatafestivalaboutasecretravedeepintheValleys.Whentheirrouteisdetouredtheyhavenochoicebuttoventureintotheunknown.Oncetheycomeacrossaderelictaquapark,theysoonrealizewhattheythoughtwastheirsalvationturnsouttobetheheartoftheCannibalslair.