In 1668 Jamaica, Morgan Adams hunts down her uncle and fellow pirate Dawg Brown, who has captured her father, Black Harry. Black Harry has one of three pieces of a map to a huge stash of gold on the remote Cutthroat Island. Dawg has another piece, having stolen it from the corpse of a third brother, Richard, while a fourth brother, Mordechai, has the last piece. Harry refuses to give Dawg his piece and escapes with Morgan's help, but not before being mortally wounded. A dying Harry reveals to his daughter the location of the map piece: on his scalp.