A mysterious massive powerful evil force is sweeping across the corners of the Multiverse without any warning, laying many worlds in ruin. In these sieges, vast multitudes of heroes from many different alternate worlds were either killed or captured and brainwashed to do their enemies' bidding in a pursuit to remove any further resistance to the unknown growing threat entirely. This unholy persecution would be infamously known throughout the game as the “Genocide of Heroes”, a catalyst that would serve as a driving force to the events of the game.
Only now aware of the growing number of ruined worlds and rapidly decreasing number of heroes in the Multiverse, the secret inter-dimensional combat organization Shinra once again acts and investigates matters that caused the Genocide of Heroes, the reason behinds the mass slaughters and the mysterious dark force that does everything horrific at this point behind the scenes.
Eventually, as everything begins to unfold and the truth to unravel, all of the Multiverse is locked in a great war between good and evil that could possibly conclude the eternal strife between light and darkness and bring about the end of all reality as we know it.
