Arthème loves playing the clarinet. He plays it in the streets, in the park, in the streetcar (at least when he does not miss it!). When he unfortunately walks under a piano clumsy removers are hauling, the heavy instrument falls down on him and he swallows his clarinet. A lot of people try to extirpate the protruding instrument but they all fail. Three farriers finally succeed in making him return to his former self.