Seeking revenge against the guard who tormented him, a young man returns to the island where he was imprisoned in reform school. But his plans for vengeance are disturbed when he encounters a strange and beautiful young woman.

While in vacation in a sea side house, a young man fall in love with a beautiful woman who pretends to live by herself in the sea. The fishermen of a nearby village think she is a monster, the female of a shark killed many years before, responsible for many disappearances.

A former boxer gets involved with a club hostess trying to escape the clutches of her gangster employer.

Udaka is a new, post-war city where corruption has already taken hold. A persistent district attorney wants to arrest and convict Katsumata, a laughing, self-confident thug. The D.A. gets an anonymous letter about the suicide five years' before of a city council member. Evidence about the case leads the D.A. to Tachibana, struggling to go straight after involvement with the mob and a prison sentence for killing the man responsible for the rape and suicide of his fiancée. One of Tachibana's friends is Keiko, the daughter of the dead councilman and the ward of another powerful official. How do these stories connect?

Two brothers compete for the amorous favors of a young woman during a seaside summer of gambling, boating, and drinking.