Prof. Ajoy Mukherjee and his spouse Aditi witness a murder, committed by the criminal Digbijay. In spite of repeated warnings from Digbijay and his right hand Loha the Professors testify against them and they go to jail for 7 years. After coming out Djgbibay turns out even stronger. He attacks Ajoy's family. He sends a man called Binod Sharma who pretends to be the friend of Ajoy's brother Joy. Digbijay and Binod conspire against Joy and Ajoy. After sending his own man to rob Joy of two lakh rupees, Binod compels Joy to commit murder. Meanwhile Digbijay stabs Ajoy and Joy gets entangled for the murder of his brother. A local inspector Dilip Lahiri also turns out to be an ally of Digbijay. While Joy remains in police custody, Digbijay rapes and murders Joy's younger sister Dia. After this, Joy's sister-in-law Aditi commits suicide. Joy teams up with his friends Kanchan and Kumar to seek revenge against Binod, Dilip, Loha and Digbijay one after the other.—Taken from Wikipedia