Holi is based on a legend about King Hiranyakaship. `Hiranyakashyap had a son, Prahlad. Prahlad was the greatest devotee of Lord Vishnu. Hiranyakashyap wanted to kill his son, so he called his sister, Holika. She had a magic robe. This robe had the power to save the wearer from burning in fire. Hiranyakashyap ordered his sister to sit on a burning fire along with Prahlad. He thought that his sister would not be harmed by the fire because of the magic robe and Prahlad would be burnt to death. But the result was the opposite to what the evil demon king planned.