[1][failed verification] Dr. Mortimer Gangreen (John Astin) escapes from prison and has set up a base at his assistant Igor's 'Really Big Castle' located outside Paris, France, and he is still bent on global domination.

Using his Killer Tomatoes, Gangreen plans to stage a second French revolution according to an old prophecy written by Nicodemus, in which the king of France (Louis XVII) will return to claim the throne.

The heroes of the film are a has-been TV actor named Michael (Marc Price) and Marie, the French girl he meets and falls in love with (Angela Visser).

With the help of Michael and Marie, Louis triumphs, and Gangreen escapes in a tomato-shaped hot-air balloon, planning revenge and swearing to return in the next movie.

Several people are shown attempting to prove themselves as the true Queen of France, and the female lead is heard saying: "The French Revolution was a big mistake."