Music composer Yao is at the peak of his career when a brain tumour surgery leaves him with anterograde amnesia. As such, his memory `resets` everyday, that he can only recall past information but not new events. Unable to perform the simplest day-to-day tasks on his own, Yao hits rock bottom until meeting his psychotherapist, Xingyue.
The tomb of Yan Dong, the former head of the Six Horsemen Division in Chang'an, is hit by tomb robbers and the Xuanmao pearl, which was used to suppress the demon king, is stolen, leading to the rise of demons in Chang'an City and the unrest of the people. The Chief Steward, Eunuch Fish (Luo Jiaying), orders Ma San (Wu Mengda), Wang Zhuge (Jia Bing) and Lei Yan (Xu Dongdong) of the Six Horsemen Division to suppress the demons and hunt for the pearl, and to hatch a terrifying plot.
Gao Yuan was common petty entrepreneur but corona lockdown have worsened the situation and kill his small business. 15th of each month, the "pay day" when all creditors and employees want Gao’s money.
The side story narrates the effort of relocating a cultural relic safeguarded beneath an ancient tomb during the Sino-Japanese era. Er Yue Hong undertook this mission by approaching the tomb which on the surface is a heavily pre-occupied Japanese army base. Tapping his skills for Chinese opera and utilizing his connections, he performed as an opera singer while fighting off the Japanese soldiers on the other. With his wisdom and bravery, he strives with his might to recover the relic.
