While Charlie is distracted with the birth of his first grandchild, son Jimmy impersonates his father in order to investigate a murder aboard a freighter in the harbor.

Movie star Shelah Fane is seeing wealthy Alan Jaynes while filming in Honolulu, Hawaii, but won’t marry him without consulting famed psychic Tanaverro first. Tanaverro confronts her about the unsolved murder of fellow film star Denny Mayo three years earlier, and she decides to reject Jaynes’ proposal. When Shelah is found shot to death in her beach-front pavilion, Charlie Chan of the Honolulu Police investigates.