In a chaotic multiverse, different versions of the same person are forced to face each other in bloody battles, where the survival of their universe and their longed-for freedom are at stake. Each victory grants them a random power, as unpredictable as it is decisive, while in the real world humans watch the spectacle with morbid fascination and amusement, indifferent to the fighters’ suffering.

The "Players", people with unique abilities, protected the world from evil as adventurers... but that was in the past. Nowadays, being an adventurer has become a hobby, with only those who seek fame and glory take it seriously. Daniel Gibson, a 29-year-old receptionist at an adventurers' guild, lives an uneventful life until a small incident changes his reality forever.

When all seemed lost, the hero HAKAMÉ sacrificed his life to protect the world from the terrible threat of the ITZIMI. Ten years later, his daughter Mari, together with the young Kamé, must join forces to prevent the ITZIMI from rising again. Along their journey, they will uncover dark secrets about their father’s sacrifice and face a destiny far greater and more dangerous than they ever imagined.