Small village Kamalpur's wealthy and kind-hearted landlord Sanjay marries his love Aparajita. On their wedding night, she betrays and kills him for his wealth. Attacked by a gorilla, Sanjay becomes Brahmrakshas in a place known as Asursthal. He loses his cool whenever he sees brides with bridal jewellery and vermilion, killing them as it reminds him of Aparajita.
In Mumbai, a family decides to conduct destination wedding of their daughter Rakhi Shrivastav at Kamalpur. Rakhi is close to her best friend Raina Sharma and easy-go-lucky flirting brother Rishabh who constantly makes fun of Raina. The whole family leave for Kamalpur. Learning that Rakhi loves Varun, Raina and Rishabh secretly get them married. Sanjay kills Rakhi. Left shattered, Rishabh and Raina decide to seek revenge from Sanjay by entering into a contract marriage. Raina discovers that Aparajita is Rishabh's aunt so Sanjay is his uncle. Aparajita's truth is found out and she is ousted out. A gorilla kills her and she becomes Brahmrakshas. Later she gets murdered by Sanjay, who comes under Rishabh's mother Mohini's control. Raina and Rishabh separate, and he decides to marry his ex-girlfriend Kiara, but realizes having fallen for Raina. Rishabh's brother Yug comes to know that Mohini is Rishabh's chachi. His wife Naina learns this but is tied and locked inthe house basement, where Rishabh's real mother Sudha is found. Mohini takes Sudha to Asursthal to kill her but Raina brings her back. Initially refusing to accept Sudha, Rishabh develops a soft corner for her. Naina goes missing. Yug makes the family believe that she is the one controlling Sanjay. Wanting to awake Narsimha, Mohini takes Raina and Rishabh along with her; they learn her truth. The housemaid Kammo instigates Yug against Mohini, and he tells everybody about Mohini's truth, pretending himself to be. Mohini loses a Narsimha stone who breaks. Due to its emitting intense light, the stone captures Rishabh into the stone. Mohini snatches it but is killed by Sanjay. While dying, she reveals to Raina about Narsimha. Rishabh comes out of the stone and notices changes in himself. Narsimha enters into his body. Kammo and Yug get attacked by Sanjay. Kammo escapes but Yug is killed. Sanjay demands Raina's blood. Naina dies. Phooli comes to know that Narsimha has possessed Rishabh. A snake bites Raina but she is saved. Sanjay gains more powers and fights Narsimha. Raina ends up in saving Sanjay but the whole village is against them. Raina and Rishabh visit the palace where Sanjay turned Brahmarakshas. Sanjay attacks the villagers who escape. Rishabh takes a different route to confuse them. As Sanjay takes the gem containing Narsimha's power, he throws it but Raina finds and gets it. She grabs the sword and stabs Sanjay who finally dies.
