Beet is a young boy who has always desired to be the strongest Buster. He aspires to be like his heroes, the Zenon Warriors, who are known as the strongest of all Busters. However, unknown to Beet, the leader of the Zenon Warriors is his brother. When Beet was a baby, Zenon wanted Beet to stay away from the path he chose, wanting him to live a life of peace which he tried to give him. One day, Beet told his heroes he had become a Buster, they quickly told him to quit, telling him he was not fit for such a thing. Beet, however, believed that Busters are fighters for justice and continued the hard Buster life. However, due to a fight with Beltorze, the "King of Tragedy", one of the strongest Vandels, the Zenon Warriors were critically hit. To make things worse, Beet showed up to the fight, trying to cheer his heroes. Beltorze saw Beet and rapidly took him as a hostage and mortally wounded him. Seeing this horror, the Zenon Warriors became distracted and were hit by Beltorze's most powerful attack, the Phantom Explosion. Thus, after receiving such an attack, they were left at a critical state. Worst of all, Beet was about to die. To save his life, they decided to give up their lives and give Beet part of their souls which were sealed in their Saiga, the power symbol of a Buster. Beet reluctantly tries to stop this; however, he is finally told that Zenon is his brother, and in a dramatic moment, Beet sees his heroes leave to try to defeat Beltorze- even without any Divine Power or Saiga. Seeing them leave, Beet promises that he will become the strongest Buster and end the suffering Vandels cause to the world.