Leng Yinuo’s funeral made the five people who had not reunited in 12 years reunited in different capacities. The five intimate high-school people from the mutual dependence to the separation, in the short and beautiful summer vacation filled with laughter and expectations of the unknown, no pain, no disappointment to life. Twelve years later, the fate of each character is far removed from the dreams that he had set.

Before joining the imperial court a young Di Renjie was a minor judge in Bianzhou. When his mentor Yan Liben was welcoming Empress Wu back to the imperial court from the Ganye Temple, he encountered a strange ghostly incident called "Qingji". Master Yan was wrongly accused of being the murderer who intended to kill Empress and was jailed. To unravel the mystery, Dee comes to Chang'an alone, and with the help of his lover Gongsun Yu and his friend Yang Lu, a small-time gangster in Chang'an, he solves the "Qing Ji" murder case