When a monstrous fanatic tidal wave strikes a sleepy coastline community, a team of survivors from various profession locate themselves entraped inside a submerged supermarket. As they try to escape to security, they soon find that there is a killer amongst them a lot more dangerous than the hazard of drowning-- savage great white sharks lurking in the water, deprived for fresh meat. As the bloodthirsty sharks start to choose the survivors off one at a time, the group understands that they need to interact to locate an escape without being consumed active.