Artists are throwing a costume party, and Steve and his master want to go, but lack costumes. While Steve wanders the streets, he encounters a pantomime horse in this chaotic and funny entry into the "Come On Steve" series of cartoons based on Roland Davies' cartoon strip.
Movies have been international business almost from the start, so it's hardly surprising that this series was distributed in France by Pathe. As often happened, Steve was given a different name for the French audience: Poulichette. Same old Steve, though.
Pathe seems to have had, or took the right to distribute this for the home market, which is why the copy I looked at was a 9.5 mm. print.