Deep right into a solo voyage within the Indian Ocean, an unnamed man (Redford) wakes to search out his 39-foot yacht taking over water after a collision with a delivery container left floating on the excessive seas. Along with his navigation tools and radio disabled, the person sails unknowingly into the trail of a violent storm. Regardless of his success in patching the breached hull, his mariner’s instinct and a energy that belies his age, the person barely survives the tempest. Utilizing solely a sextant and nautical maps to chart his progress, he’s compelled to depend on ocean currents to hold him right into a delivery lane in hopes of hailing a passing vessel. However with the solar unrelenting, sharks circling and his meager provides dwindling, the ever-resourceful sailor quickly finds himself staring his mortality within the face.