Lord Shiva father in law, Daksha was very angry at him because her daughter married Lord Shiva against his promises. So in order to take revenge, he conducted or performed a Yagna (A very auspicious ceremony or action in Hindu culture). Daksha invited every person from all over the world, but not his son in law and his own daughter, Sati. When Sati got the news about the Yagna, she could not resist herself and went to attend the ceremony. There nobody paid any type of attention to her, including her parents. She did not annoyed by this action of his father, but when his father did not even respect her husband, she felt dreadful. The agony was so much so, that she jumped in to the fire (Yagna) and give away her life. The loss of Sati was very painful to the Lord Shiva and due to this, he got furious and angry. Shiva went to the place where Yagna was being performed and devastated that area.
Then Lord Shiva carried Sati all over the world, as he was in utmost grief that time and hoping to get Sati life back. This made all other gods to feel bad for lord Shiva and in order to get back lord Shiva to normal state, they visited Lord Vishnu. Lord Vishnu used his Sudarshan Chakar and severed Sati body in to 51 pieces. These body parts fell on different part of earth and whichever place they fell on earth is considered holy. So, for every place, there is a Shakti Peeth.
Vibhash, at Tamluk under district Purba Medinipur, West Bengal.
Left ankle fallen here