Finn Linden believes he is ordinary, but is invincible. He saves Valkyrie Autumn Willow. Descending the mountain for a marriage contract, he is rejected by House Willow and humiliated by House Shaw. Facing enemies, Finn Linden's casual actions transform into divine skills. As his identity is revealed, his former fiancée regrets, and powerful figures beg. To save his beloved, Finn Linden gives up his Imperial Core, becoming an invincible legend.