Two stepsiblings are talking in their room when their stepsister enters carrying a wooden trunk; she explains that she found it in a hole in the basement. The three of them decide to open it and discover a doll inside. Upon touching it, they all suddenly swap bodies—with the boy ending up in the body of one of his stepsisters. While this terrifies them, it also sparks their curiosity; driven by this intrigue and their natural instincts, they end up exploring their new sexuality.
