Since childhood, five best friends – Matteo, Jonas, Chris, Ben, and Oliver – have dreamed of making it as a boy band. When a unique opportunity arises to take a step closer to their musical dream, one band member suddenly wants to quit, calling into question the future of the whole group. The five boys have to rise above themselves – and suddenly find themselves in a completely...

一群结伴度假的游客深入路易斯安那州沼泽地带，意外偏离路线彻底迷失方向。原本轻松的休闲之旅迅速沦为生死绝境，一头体型庞大、性情凶暴的野生河马在沼泽深处四处游荡，将这群闯入者锁定为猎杀目标。被困在泥泞湿地、通讯全无的众人无路可退，只能在危机四伏的芦苇荡与暗河里拼死周旋，对抗这头力量完全碾压人类的狂暴巨兽。