Two couples on holiday in the Algarve: Scott and Katrina, Danny and Robyn.One couple who like sunbathing on the beach, one couple who like exploring the region.A simple two-week holiday in the sun: What could go wrong?How about the end of the world as we know it for starters?A desperate plight for one couple.An even more desperate plight for the other. as they discover the fragility of survival...