A just-divorced man must learn to care for his son on his own, and then must fight in court to keep custody of him. Ted Kramer is a career man for whom his work comes before his family. His wife Joanna cannot take this anymore, so she decides to leave him. Ted is now faced with the tasks of housekeeping and taking care of himself and their young son Billy. When he has learned to adjust his life to these new responsibilities, Joanna resurfaces and wants Billy back. Ted, however, refuses to give him up, so they go to court to fight for the custody of their son.