A group of four young men in America applies to job counselors at a camp from Spain. The foursome hopes to have part of an unforgettable summer. However, this dream turns into a nightmare when suddenly one of them begins to savagely attack each other. Before the group to realize what is happening, a devastating virus spreads rapidly while the other three councilors must find a way to escape from the camp in the middle of the wild. How they manage this when no cell phones, no cars no longer works?