A mysterious entity arrives and uses "time holes" to scatter everyone across different points in history of PlayStation. Heroes, during their journey, must overcome various hybrid versions of their worlds, encountering dangers still stronger than them and other characters, intent to discover this mysterious character and restore their worlds to a state of normalcy. Only one can reach the mysterious threat that awaits them and obtain its power. After a series of fights with other characters, the player discovers that Polygon Man is responsible for bringing all the characters together from their worlds and forcing them to fight each other in order to turn them into his minions. After Polygon Man is defeated, the player absorbs his power and their character returns to their own world, where they receive their own ending and is shown what they do with their newfound power (Good or Evil).