When four young Americans sign up to work as counsellors in a remote Spanish camp, their visions of a fun-filled summer quickly dissipate. As one of the four is seemingly infected with a deadly disease, they begin attacking anything and everything in their path. Before the group even realise what's happening, a rage-inducing virus begins to take hold, spreading rapidly one by-one among them. Before long, each must fight for their lives, if they have any hope of surviving the night. 2015 Castelao Pictures, S.L. Pantelion LLC Rebelión Terrestre Film, S.L. Sumcamp La Película A.I.E. Under Exclusive License to Kaleidoscope Home Entertainment Ltd.