The UnderNet isn't just a digital space, it's a graveyard where even the strongest programs can be dragged back into existence against their will. Forte wakes up powerless, something that should never happen to him, and that single violation of the natural order tells you everything about what's coming. This movie understands that in the Rockman.EXE universe, the real horror isn't losing a battle, it's losing control of your own nature, your own code.
A mysterious force awakens in the depths of the UnderNet, pulling the legendary virus Forte from his slumber. Before he can comprehend what's happening, he's engulfed by a colossal entity of pure purple energy. Simultaneously in the city above, that same destructive power tears through the digital barrier separating the internet from the real world. A towering pillar of light erupts without warning, consuming everything in its path and sending citizens fleeing in panic. Mega Man and his operator Lan rush to investigate, but they quickly realize this threat operates on a scale beyond anything they've faced before. The entity seems to feed on both digital and physical matter, growing stronger with each passing moment. As the pillar spreads chaos across the city, Mega Man must venture deeper into cyberspace than ever before to confront the source of this calamity. What emerges is a battle that challenges everything Mega Man understands about the connection between the internet and humanity itself. Time is running out, and failure means the complete annihilation of both worlds.