Sixteen-year-old shy, socially awkward trans teen Bass reluctantly skips school and goes on a boat trip with his adventure-seeking girlfriend, Rosie. When a sudden storm smashes their boat on a rocky shore off a deserted island, Bass and Rosie struggle to make it to safety. Bruised and battling hypothermia, the pair have to seek shelter and work together to survive until they can be rescued. After a horrible night, Rosie, an experienced climber, decides to scale a steep cliff to find help. She falls and injures herself badly. Now Bass has to find the strength and courage to swim around a dangerous headland and make his way back to civilization before its too late.