A sleepy Australian coastal town is rocked by a freak tsunami, trapping a group of people in a local supermarket. Among them are various townsfolk, including lifeguard Josh, who is grappling with a personal tragedy. As the water rises inside the store, the group quickly realizes that the tsunami has brought with it a far more sinister threat—a pack of hungry great white sharks. Panic and tension ensue as the survivors must navigate the flooded aisles, searching for ways to evade the deadly predators while struggling to maintain their sanity and cohesion as a group.

Their situation grows more desperate as they deal with dwindling supplies and injured fellow survivors. The supermarket’s structural damage complicates their efforts to escape, and personal tensions and hidden agendas come to a boiling point. The group must use their wits, resourcefulness, and courage to fend off the merciless sharks and find a way out of the submerged building. The rising stakes force the survivors to confront their fears and past mistakes, all while battling a relentless and hungry enemy lurking beneath the surface of the water.