After a shipwreck, Jack, a military veteran, and Marcy—the stepmother of his girlfriend, Ruth—find themselves stranded together on a deserted island. Although their relationship is initially strained, they are forced to rely on each other to survive. After reuniting with other survivors, the camp's leader, Richard, establishes a tyrannical rule and frames Jack and Marcy, leading to their banishment. Jack and Marcy, joined by a follower named Mia, set up a new camp, creating a rival faction. The arrival of two fugitives, Lucas and Ron, plunges the camp into a dire crisis. Ultimately, thanks to Mia's self-sacrifice and the arrival of outside rescuers, the villains are punished and the survivors are saved.
