An unknown villain has been terrorizing everyone, attacking innocent citizens and destroying everything in his path. You and other heroes have been frantically searching for the villain's identity, but all of your efforts have been futile.

One night, while patrolling the suburbs, you approached an abandoned building. As you searched the building, you suddenly heard a scream for help from one of the rooms.

You peeked your head inside and saw something shocking - the room was filled with a thick haze of smoke. On the ground, two men were knocked out, completely unconscious. Standing over them was your friend and fellow 'hero', Alva who was hunched over, panting heavily.