At the height of the Ming Dynasty, Beijing seemed like a prosperous city by day. But in the darkness of the night, creatures of ancient myth like demons, fairies, ghosts and monsters appear, mixed amongst mortals. The reappearance of the Potion of Immortality has drawn out the gods, demons and even the royal guards... And the young girl Min Ruyue, carrying the secret of the potion, is caught in the fight for the potion between heaven and earth. Is the sudden appearance of a companion beside her a friend or foe? Will she be able to control her own destiny?