​Once every millennium, the gods hold a council to decide the fate of mankind. Finally fed up with mankind's unceasing wars and destruction of the environment, the gods have decided the end of mankind, when a single Valkyrie, Brunhild, proposes Ragnarok, a best-of-thirteen tournament between gods and mortals. As the 13 gods of different mythologies and religions engage in duels with 13 central figures in the history of mankind, will humans finally be doomed to eternal annihilation