Stanley Kramer's landmark study of racial prejudice stars the ace comic duo of Spencer Tracy and Katharine Hepburn as perplexed parents. When Joanna (Katharine Houghton) returns home with her new fiancé John Prentice (Sidney Poitier), a distinguished black doctor, her mother accepts her daughter's decision, but her father is shocked by the prospect of the interracial union. With the doctor's parents equally dismayed, both families must meet to explore the limits of their intolerance.