1) Malron is a bounty hunter seeking revenge on the mob bosses that murdered his parents. He tracks down the first boss, Algore, at a space station shop where Algore has taken a shopkeeper's daughter hostage. Malron rescues the daughter and captures/kills Algore.
2) Malron is assigned to capture the next boss, Borin. He tracks Borin down and is offered money to let him go, but Malron refuses due to wanting revenge. Malron captures/kills Borin.
3) Malron tracks down the street boss Kronos, who flees in an anti-gravity pod that crashes. Malron defeats Kronos