The strongest warriors of the demon race have perished in the war with the gods. In a last attempt to prevent the demise of their people, the demon Ying Zhen travels to the underworld, hoping to retrieve the souls and revive his comrades. There, he meets Laryana, the creator of the soul lanterns, that guide the dead on their way to reincarnation. Thanks to a misunderstanding, Ying Zhen manages to enlist her help, not knowing that what he is about to do will change more than just their own lives.