To get away from their busy lives, the Wilson family are on vacation in Santa Cruz, California, with the plan to spend time with their friends, the Tyler family. One day at the beach, their young son Jason almost wanders, provoking her mother, Adelaide to become more protective for her family. That night, four mysterious men enter the Adelaide children’s home where they live. The family is shocked to learn that the intruders looked like them, only with grotesque appearances.