The drama tells the story of a group of online game experts. Because of a bug, they get drawn into the game. The border between the real world and the gaming world begins to blur.

After being defeated in a war against an invading kingdom, the Prince of Qi had his military power removed. His brother, the Prince of Yun decided to make use of the chance to support the ascension of the young Emperor. Prince Qi came to a tacit agreement with the Emperor and decided to retreat from courtly affairs. Meanwhile, he embarked on a search for the truth in secret under the alias of Pei Zhao. On his journey, he meets young detective Su Ci, the young master Xie Bei Ming, and poison master Dong Ru Shuang. As the four teams up to solve a series of mysteries, they also discover each other’s and their own secrets

Liu Zi Guang has no memories of the past eight years of his life. When he returns to his hometown, Jiangbei, all he knows is that he wants to live life as an upstanding citizen. But those mysterious eight years are bound to catch up to him as he finds his father injured in the hospital upon his return. Hu Rong is a detective whose looks are as fiery as her personality. She's young, but her tough demeanor and unquestionable skills make her a seasoned officer. She cares intensely about her work, doing whatever it takes to protect the citizens of China. Nie Wanfeng is the leader of a criminal organization. He is a hugely tricky opponent for the police, with both his smarts and viciousness keeping him a free man. When Liu Zi Guang and Hu Rong meet, they initially struggle to get along. But their relationship grows as they both come up against Nie Wanfeng together. Things only complicate, however, as Hu Rong learns more about Liu Zi Guang's past, just as she finds herself falling for him.

Wu Xin is an immortal who doesn't know where he was from, how long he lived, or what he is. He wanders the earth with no purpose in life and no money. During one of his destitute spells, he meets Yue Ya who gives him her last morsel of food. To repay her kindness and get more food in their stomach, he decides to capitalize his only skill set: Killing monsters. They begin a wondrous and often dangerous adventure of fighting supernatural evil, one paying customer at a time.