Damini: Lightning is a crime court drama. It follows the story of a young woman named Damini (Meenakshi Sheshadri), who lives with her husband and in-laws in a joint family. She witnesses the rape of her housemaid, and her subsequent death, by her brother-in-law and his friends, and decides to fight for the justice of the deceased victim. She faces a number of challenges and opposition from her family, until she meets an ill-reputed lawyer named Govind (Sunny Deol), who agrees to fight the case. However, will the two succeed in bringing justice to the innocent girl?