Inspired by a gangster movie, Urulu refuses to sign the deed allowing McHale and the crew the use of their Island.  So McHale and Binghamton join forces to make him change his mind.

While Binghamton is laid up in the hospital, acting base commander Carpenter jails the 73 crew, and McHale and Parker plot to get them out.

Admiral Hardesy's daughter is getting married, and Parker must stand in for the chaplain, while McHale and the crew try to retrieve a stolen tea set, given as a gift from Captain Binghamton.