Season 1 of Grahan premiered on 24 juni 2021.

Grahan's story is about the anti-Sikh riots that happened in 1984 when Indira Gandhi was killed. Rishi Ranjan is one of those faces that has played a prominent role in this riot. Almost after 30 years, the case is opened again and SIT is formed in Bokaro. Amrita Singh is made in charge of this SIT committee. Along with investigating officer she goes into the depth of the case and tries to find out who were the people that were involved in those times.