The God “ Indra “ asked Subali and Sugriwa, two brothers who were bold and brave, killed the giant Mahesa Sura. If they succeed, the God Indra would give the Goddess “ Tara “ as reward for both them.
Mahesa Sura lived in cave, Subali entered the cave, and his brother Sugriwa waited at the front of the cave, reviewing if the water of the river which flowed from the cave, were mixed the red blood, it mean that Mahesa Sura was killed. But on the other hand, if the water was white, it mean that Subali had died.
Subali was able to kill the giant Mahesa Sura by banging his head against the wall of the cave. However, Sugriwa saw that the river was mixture by red and white blood, and he thought that both Mahesa Sura as well as Subali had died.
He closed the cave by a large stones, then went to the God Indra took the reward the Goddess Tara and married her.

Subali manage to get out from the cave finaly and he could not find his brothers, Sugriwa. When he realized that his brother had taken the reward the Goddess Tara, He became very angry and the war between Subali and Sugriwa broke out.
Sugriwa lost and left into the forest. He met Sang Rama who was looking for his wife, Sinta. He was helped by Sang Rama defeated Subali, and Sugriwa won the Goddess Tara again.