The Completely Mental Misadventures of Ed Grimley

Ed has agreed to fill in for his cousin Lemar Grimley, driving his hansom cab at the Grand Bilt Hotel for the day (though he must deal with the reluctance of the horse, Leonard). Later at the racetrack, Leonard falls for a pretty filly but is rejected, and Ed suggests they enter the race to impress her.

Ed foolishly thinks he's been asked to play triangle for the city's philharmonic. Suddenly he's been arrested for a robbery he didn't do on his way to the concert hall.

Ed is hanging out with Wendall, who is the annoying brother of his crush - the amateur actress Miss Malone. Ed and Wendall go to the amusement park. They are off on a rocket ride to another planet which is ruled by an alien queen.