Three hundred years ago, she fell in love with the Prince of Tiangong, but inside the red tent, he had sex with another woman. At that moment, she destroyed herself and turned gray in an instant.
Later, the prince of Tiangong fell into the devil's path for unknown reasons... What the two lovers ended up with was that she forgot him and he became a devil.
Three hundred years later, they meet again. Their love is not favored by the world. Can they finally grow old together?