Ryu (Akira Kobayashi) sets foot on the Yokohama port with a suitcase filled with 300 thousand dollars. He was sent by a jewelry company in Hong Kong to retrieve a certain diamond that was stolen from them. The "Himalayan Star" is worth couple hundred million yen and unbeknown to Ryu, it now lays in the hands of Aizu (Jo Shishido), the infamous ”Pirate of the Tokyo Bay."
A newly hired daily newspaper writer covering the society beat receives an assignment to cover Tokyo at night by walking and observing it. He gets into the right frame of mind by dressing the part as a vagrant with not a penny to his name. He gets into trouble ending up at the police station slammer overnight. He has no material to write about and, with his assignment unfulfilled, faces a cross editor.
After World War II life in Japan was hard. There was lawlessness, rapine, never enough food or money. One girl, raped by three men, called out the name of Kentaro before she died and this was something that people in this small section of downtown Tokyo remembered. Life went on, however, and local boss Hiramatsu Daizo decided to build a market, aided by his daughter Aya. They met opposition until one day a young man named Kentaro appears who it is rumored he was the vengeful lover of the murdered girl. He lives with Sabu and Yukari, the children the girl looked after before she died, and helps with the market, coming to the rescue with a bulldozer when Daizo is threatened by a rival group. When Daizo is finally killed, Kentaro carries on the work. Finally the market is completed, the rival group makes a last stand but is machine-gunned down by Kentaro who, after saying that he was not the one whose name the dying girl called out, leaves town for good.
