The Dutchman is a master jewel thief who hasn't been active during the past 10 years. He is known to one person only, who gives himself up to the thief in exchange for Mrs. McMillan, after she has been kidnapped.

During the move into the McMillans' new house, Sally is terrified to discover a dead body in one of the barrels delivered by the movers. She calls Mac, but when he and Sgt. Enright arrive, the body is gone. As Sally tries to prove that she didn't imagine it, Mac and Enright investigate the moving company and discover that several people have lost items and have also reported missing persons on the same day.