This temple is one of the Siddha Peeths, situated 21kilometres from Tanakpur. As per the mythological scriptures, father of Goddess Sati, Daksha Prajapati, organized a sacrificial ceremony here where everyone was invited except Lord Shiva. When Goddess Sati discovered about her father’s intention to humiliate her husband, she immolated herself in the sacrificial fire. Lord Shiva came in very angry and carried back his wife’s corpse, and Purnagiri is one place where one of her body part fell.