Water of repentance.

The people of Yazd are harassed by Qasim the extortionist, until Habib and Tahir force Qasim to change his ways. One night, Habib meets Shirin, Qasim's friend, in a notorious neighborhood and offers to marry her if she repents. Habib takes Shirin to Mashhad and gives his sister Maryam to Tahir. Qasim, who holds a grudge against Tahir, insults Maryam. The local baker, who witnesses the incident, remains silent, and Tahir marries Maryam to protect his reputation and that of his friend. Qasim's henchmen spread the rumor that Tahir married her after deceiving Maryam. They lock him in a room to silence the baker. Habib returns to Yazd with the intention of taking revenge; But the local confidants force him and Taher to face each other in the depths of the fort to prevent bloodshed. Before the fight begins, the baker escapes with a wounded body and, with Shirin's help, makes his way to the fort and reveals the truth. Habib and Taher go after Qasim and eventually hand him over to the police.