After their father dies, his children try to get by on a house boat.

A roughneck named Komakichi of Kawachi, Osaka, comes back from a three-year training course to become a chef, hoping to be with his crush Tamae, a daughter of a Japanese restaurant’s owner. His father is not happy because Komakichi has no intention to become a rickshaw man to follow in his father’s footsteps.

Kazuo, a Japanese army intelligence agent, reveals a foreign intelligence network in Japan and then sent to Borneo Island with a special mission.