Long time ago, there was a family. They were a father which was in form of dog, his name is Tumang, a mother which was called Dayang Sumbi, and a child named Sangkuriang.
One day, Dayang Sumbi asked her son to go hunting with his lovely dog, Tumang. After hunting all day, Sangkuriang began desperate and worried because he hunted no deer. Then he thought to shoot his own dog. Then he took the dog's liver and carried it to home.
Soon Dayang Sumbi found out that it was not deer liver but it's Tumang's. So, she was very angry and hit Sangkuriang's head. In that incident, Sangkuriang got wounded and scar then cast away from his home.
A few years later, Sangkuriang had travel many places and finally arrived at a village. He met a beautiful woman and felt in love with her. That women was Dayang Sumbi, his own mother. When they were discussing their wedding plans, Dayang Sumbi looked at the wound in Sangkuriang's head. It matched to her son's wound who had left several years earlier. Soon she realized that she felt in love with her own son.
She couldn't marry him but how to say it. Then, she found the way. She needed a lake and a boat for celebrating their wedding day. Sangkuriang had to make them in one night. He built a lake. With a dawn just moment away and the boat was almost complete. Dayang Sumbi had to stop it. Then, she lit up the eastern horizon with flashes of light. It made the cock crowed for a new day.
Sangkuriang failed to marry her. He was very angry and kicked the boat. It felt over and became the mountain of Tangkuban Perahu.
