The film tells a sad and funny story of friendship between men living at the bottom of the city: Yamada Takayuki plays Gondo Ukon, a man who is in a difficult world but still refuses to bend, and who loses his temper when he sees young people shouting in the tavern. The only person who can get along with Ukon is Ushiyama (played by Arakawa Yoshiyoshi), who is kind and honest and works as a gold digger. Ukon's younger brother, Sakon (played by Sato Takeru), a business elite, is deeply envious of the two's free and easy life despite their low income. One day, Ukon and Ushiyama picked up an old robot in the scrapyard next to their residence. Sakon discovered that this robot might be a high-tech product that surpasses modern science, so the three began to try to use the robot's performance to dig for gold...