18 years after the events of Sibling Hatred, Lava has been living a peaceful life, and had gotten over the death of his brother, Quil. On a warm summer day, he gets an unexpected phone call from his father. Lava's father all of a sudden wants his son to test his might in an underground fight club, and claims it would be for the better for everyone in the world. Lava doesn't buy it, but he will find out about a horrible truth about his father, forcing the two to be pit in a Father vs. Son fight to the death.