After a violent altercation with his stepfather, Mark Mitchell flees from Indiana to sunny Florida. While traveling there, he picks up hitchhiker Melissa Monroe and they become girlfriend and boyfriend. Telling her his story, she suggests that he come live with her and her father and work at the family orange grove. Instead of picking oranges, however, Melissa's father, Al, enlists Mark in criminal activities well hidden under the shelter of the legal grove business. Heavily connected to the crime world, Mark is dragged in deeper and deeper; yet he tells Melissa that he would never turn her father over to the law. But then, Mark discovers evidence suggesting an incestuous relationship between father and daughter. Melissa cannot recall what is actually occurring because Al is doing something to alter her memory of the affair. Astonished and angered, Mark intends to take revenge on Al, who has now gone too far.