Team Lightyear begins to investigate the recent amount of robo-homicides and they come to the conclusion that NOS-4-A2 is behind them. Not only Team Lightyear is on the case though, but the slayer known as Savy SL-2 is with them. Together Team Lightyear and Savy SL-2 must find a way to stop NOS-4-A2 and save his robo-slaves.