The serial "Hara Hara Mahadeva" revolves around the life of Lord Shiva, one of the principal deities in Hinduism. The show is a mythological drama that narrates the stories of Lord Shiva's life, including his birth, marriage to Goddess Parvati, and his role as the destroyer of evil forces. The serial also explores the relationships between Lord Shiva and other Hindu deities, such as Lord Vishnu and Goddess Durga.