In the year 20XX, Protoman has unbelievably committed atrocities against the world, commanding an army of rampaging robots bent to destroy everything in its path. As chaos ensues, Protoman suddenly invaded the Light residence and kidnapped his creator, Dr. Light.

To reach Protoman, Rock, has given his combatant sister Roll, his buster powerup, making her charged Roll Buster more power & range; despite him being benched for this act. Without Dr. Light’s guidance, they must act in urgency and use what he left after the kidnapping, with Tango only having a few upgrades. However, Dr. Cossack has offered them his help and created a new ally, Beat the blitzing, blue bird!