The character "Santa" is a vagabond whose main source of income is locating lost coins on the streets of Tokyo. He is dating the pretty girl Omitsu, but her father Seizo does not consider him suitable for becoming his son-in-law. Seizo breaks-up their relationship and finds a new, wealthy boyfriend for Omitsu. Santa figures that he needs money to regain his girlfriend, and starts desperately seeking for a job. But nobody is willing to hire him. Noticing that the foreign-import film "King Kong" is a box office hit, Santa offers to dress up as King to promote a movie theater that is playing this film. He is hired on a try-out basis. Santa starts regularly appearing as King Kong in theaters, and goes on staged rampages against miniature buildings. During one of his performances, he notices Omitsu with her new boyfriend. Blinded by rage, Santa goes on a real rampage and chases after the man, both inside and outside the theatre. Santa beats up the man and leaves his unconscious body on the streets. But the audience thinks that his rampage was part of the performance and they are enthusiastic about it. He gets offered a higher salary for repeat performances, and he now has enough money to gain Seizo's approval and to start dating Omitsu again.