Three guests know almost nothing about their fathers' past. Stephen King's father walked out on the family when Stephen was two years old and never returned; Courtney Vance's father was a foster child and never knew who his biological parents were — after his suicide, Courtney wants to learn more about his roots; and Gloria Reuben's father was 78 years old when she was born — he died when she was young, taking the secret of his ancestry with him. Henry Louis Gates solves the mystery of their paternal ancestry and introduces them to relatives they never knew they had.