Short puny Jules would like to be a beefy man and he does body-building every morning to no avail.All the big boys around laugh at him and call him names ;these hefty men are burglars and Jules feels compelled to help them with their dirty deeds.In the house they burglarize,Jules meets again Mémette ,one of her former friends and you would not believe it, ,a (magic) kiss from Mémette's lips turns frail Jules into Hercules. The doctor examines the strong man and kisses (twice) the girlfriend to see if it "works" with someone else.