A group of friends, Luke, Matt, Suzie, and Kate, along with the ship's captain Warren, embark on a sailing trip to deliver a yacht to its new owner. As they are enjoying the journey, disaster strikes when the yacht capsizes after hitting a submerged reef. They find themselves stranded in the open ocean with the vessel slowly sinking. Faced with the grim reality of their situation, Luke proposes swimming towards a distant island he believes is a possible chance of survival, while Warren opts to stay with the wreck, believing that staying put increases their chances of being found.

Tensions run high as the group debates the best course of action. Ultimately, Luke, Matt, Suzie, and Kate decide to risk swimming towards the island, leaving Warren behind. As they begin their perilous journey through shark-infested waters, their resolve, friendships, and will to survive are tested beyond measure. They quickly realize that the ocean is a relentless and unforgiving force, bringing not only physical challenges but also psychological strain, forcing them to confront their innermost fears.