Narasimha Avatar follows Dijendra Pratap Singh, a powerful businessman and gangster in Kathmandu, whose empire is threatened by a mysterious masked vigilante believed to be Narasimha. To restore order, Avinash Bikram Shah, a suspended SP with a deep-seated grudge against Dijendra, is reinstated. Amidst this power struggle, Subash, a young man recently returned from London, forms a bond with Kusum, unaware of their shared tragic past. As Subash’s connection to the masked vigilante is revealed, the story unfolds into a tale of vengeance, love, and justice, culminating in a climactic battle where Subash, as Narasimha, confronts Dijendra to avenge his family’s murder and bring peace to the city.