Scotland Yard is looking for jewel thieves in Hong Kong, and O'Toole thinks that it would be fun to help them out as an undercover man disquised as a courier for the crooks.

Commander Stoner's psychologist brother-in-law, Arthur Ainsley, visits the Appleby and comes to the conclusion that the crewmen aren't really happy -they're just hiding a deep-seated depression.

O'Toole invites Prince Pussik of Tiboria, who is also his country's Grand Admiral of the Navy, aboard the Appleby but he soon regrets it - the visitor loves to give orders, he's only 12 years old.