There was a man who was living in north Sumatra. The man did some gardening and fishing for his daily life. One day, this fish turned into a beatiful beautiful princess, and he felt in love with her. T he woman asked the man to promise not to tell anyone about that. The man made the deal and they got married. O ne day, when the man was angry with his son, he accidentally told his son that his mother was a fish. Then she told her daughter to run up the hills because a huge disaster was about to come. The whole area got flooded and became Toba Lake, she turned into a fish again.