Once upon a time in area of West Sumatra, there was a village in the foot of Tinjau Mountain. The people of the village lived happily. Among the villagers there lived a family consisted of nine young men (called bujang Sembilan) and a young woman. They were Kukuban, Kudun, Bayua, Malintang, Galapuang, Balok, Batang, Bayang, and the youngest of the men named Kaciak. While the woman was a girl named Siti Rasani, and her nickname was Sani. Both their parents died long ago, so Kukuban as the eldest son became the head of household. All decisions was in his hand.
The chief of the village was a kind and wise leader. His name was Datuk Lambatang. He always took care of the villagers, especially bujang sembilan and their sister. He often visited them with his wife and his son named Giran. He never missed joining his father to visit bujang sembilan’s house because he wanted to meet Sani. He fell in love with her. Fortunately, Sani also loved him.
One day Giran told his parents that he wanted to marry Sani. Datuk Limbang agreed. He would talk to bujang semnbilan about the marriage after the harvest. Meanwhile, Sani also talked to her brothers about Giran. They all agreed. And they also knew Datuk Limbatang would propose her after the harvest.
Later, harvest was coming. All the villagers were happy because of it. They had a habit to celebrate harvest by having pencak silat competition. It is traditional martial art. Each family sent a young man to join the competition. Kukuban was the representative from his family and Giran represented his family.
Kukuban first had a match with a young man. Kukuban won the match. He then had a match with another man. Again he won. He always won. And it was time for Giran. Later, the two of them had an amazing match. Both of them were very skillful. At the first Kukuban underestimated Giran. He was much younger than Kukuban. But he was wrong. Giran could beat him. Finally Kukuban lost the match! Kukuban was very upset. He though that Giran would give up. Especially that Giran would marry his sister. He felt that Giran humiliated him. He was waiting for the right time to revenge!
As agreed, Datuk Limbatang and his family came to bujang sebilan’s house. He wanted to propose Sani to be Giran’s wife. Surprisingly, Kukuban rejected the proposal.
“No, I will not let Giran marry my sister. He was not a good man. I have a proof about it. In the pencak silat match, he attacked me brutally”, said Kukuban.
“But it was only a game. I don’t think he attacked you brutally. Many people watched the match and I’m sure they all agree with me,” said Datuk Limbatang.
Unfortunately, Kukuban had made up his mind. He rejected the proposal. It made Sani and Giran were very sad. However both of them still met secretly since they loved each other.
Kukuban finally found out. He and his brothers send them to the traditional court. He accused them having a sinful relationship. And they should be punished. They would be thrown to the crater of Tinjau Mountain.
“Please, belief us. We are innocent. We never do anything wrong,” said Giran. However, Kukuban and his brothers did not care about them. So they were going to be thrown to the crater of the mountain. A moment before they were executed, Giran prayed.
“God, grant our pray, when we are wrong, please destroy our body in the crater. But if we are innocent, make this mountain erupt and change bujang sembilan as fish.” Then they were thrown into the crater.
Not so long after that, the mountain erupted. People were in panic and they saved their lives. Amazingly, bujang sembilan slowly turned into fish. And the crater was getting bigger and bigger. It finally became a lake. People named it as Maninjau Lake