Without warning, all of humanity is abruptly transported to another dimension – a colossal, deadly arena. Every man, woman, and child is forced into a gladiator's role, armed with a weapon and ordered to fight. Facing hordes of powerful monsters and battling alongside random strangers, the unfair game of survival begins, instantly extinguishing billions of lives. In this brutal gauntlet, the only options are to complete numerous trials or perish. Yet, a faint hope exists: if just one person can complete every raid, humanity will be redeemed and returned to its original world. With no save points, no revives, no retries – only one life to navigate this marathon of death – one man uncovers a crucial exception to the game's brutal rules.