Sheik Abdul and his minions arrive in Bigtown where they encounter Sgt. Candy Kane. The potentate decides she would make an excellent 10th wife and it's up to Carter as Captain Nice to prevent it without causing diplomatic problems.
Carter Nash, in his Captain Nice identity, is to testify in court. But nefarious arsonist Lipton knows his secret persona and threatens to expose it if he does. Lipton also has a few fires planned.
Captain Nice learns of a major robbery being planned and is determined to stop it. But he has a problem as he is out of the formula that creates his invisibility and must get his hands on a new batch.