The film tells the story of a man washed up onto an island populated by turtles and crabs, but devoid of humans. The castaway finds himself confronted by a huge red turtle, which obstructs his efforts to escape the island, but also with whom the castaway bonds. He eventually comes to accept his fate and learns to survive alone on the island. That is until the red turtle mysteriously became a woman. The couple go through life's milestones surrounded by crabs, insects and a vast ocean.