In Heian-era Kyoto, a woodcutter and a priest, taking shelter from a downpour under the Rashōmon city gate, recount a story of a recent assault and murder. Baffled at the existence of conflicting accounts of the same event, the woodcutter and the priest are joined by a commoner. The woodcutter claims he had found the body of a murdered samurai three days earlier, alongside the samurai's cap, his wife's hat, cut pieces of rope, and an amulet. The priest claims he had seen the samurai travel with his wife on the day of the murder. Both testify in court before a policeman presents the main suspect, a captured bandit named Tajōmaru.
In Tajōmaru's version of events, he follows the couple after spotting them traveling in the woods. He tricks the samurai into leaving the trail by lying about finding a burial pit filled with ancient artifacts. He subdues the samurai and attempts to rape his wife, who tries to defend herself with a dagger. Tajōmaru then seduces the wife, who, ashamed of the dishonor of having been with two men, asks Tajōmaru to duel her husband so she may go with the man who wins. Tajōmaru agrees; the duel ends with Tajōmaru killing the samurai. He then finds the wife has fled.
The wife, having been found by the police, delivers different testimony; in her version of events, Tajōmaru leaves immediately after assaulting her. She frees her husband from his bonds, but he stares at her with contempt and loathing. The wife tries to threaten him with her dagger but then faints from panic. She awakens to find her husband dead, with the dagger in his chest. In shock, she wanders through the forest until coming upon a pond and attempts to drown herself but fails.
The samurai's testimony is heard through a medium. In his version of events, Tajōmaru asks the wife to marry him after the assault. To the samurai's shame, she accepts, asking Tajōmaru to kill the samurai first. This disgusts Tajōmaru, who gives the samurai the choice to let her go or have her killed. The wife then breaks free and flees. Tajōmaru unsuccessfully gives chase. After being set free by an apologetic Tajōmaru, the samurai kills himself with the dagger. Later, he feels someone remove the dagger from his chest, but cannot tell who.
The woodcutter proclaims that all three stories are falsehoods and admits that he saw the samurai killed by a sword instead of a dagger. The commoner pressures the woodcutter to admit that he had seen the murder but lied to avoid getting in trouble. In the woodcutter's version of events, Tajōmaru begs the wife to marry him. She instead frees her husband, expecting him to kill Tajōmaru. The samurai refuses to fight, unwilling to risk his life for a ruined woman. Tajōmaru rescinds his promise to marry the wife; the wife rebukes them both for failing to keep their promises. The two men unwillingly enter into a duel; the samurai is disarmed and begs for his life, and Tajōmaru kills him. The wife flees, and Tajōmaru steals the samurai's sword and limps away.
The woodcutter, the priest and the commoner are interrupted by the sound of a crying baby. They find a child abandoned in a basket along with a kimono and an amulet; the commoner steals the items, for which he is rebuked by the woodcutter. The commoner deduces that the woodcutter had lied not because he feared getting in trouble, but because he had stolen the wife's dagger to sell for food.
Meanwhile, the priest attempts to soothe the baby. The woodcutter attempts to take the child after the commoner's departure; the priest, having lost his faith in humanity after the events of the trial and the commoner's actions, recoils. The woodcutter explains that he intends to raise the child. Having seen the woodcutter's well-meaning intentions, the priest announces that his faith in men has been restored. As the woodcutter prepares to leave, the rain stops and the clouds part, revealing the sun.
