When Li Qian's grandmother passes away Zhao Yunlan and Shen Wei is pushed together to figure out what it all means. Suddenly, more Dixing people appears on Haixing and a Sundial pendant reveals the truth in more ways than one.

A girl is killed, and Zhao Yunlan is put on the case. He speculates that another student, Li Qien, is the real target, and is intrigued by a reserved Professor by the name of Shen Wei who knows more than he's willing to share.

Stranded in a remote village, the S.I. Team and Shen Wei and students stay in a strange guest house for the night. Wang Zheng tells them the story of her ancestors. Zhu Jiu stirs up trouble for the S.I. Team with some monsters. Wang Zheng drugs the group and leaves to sacrifice herself. Zhao, Guo and Old Chu go to find her. Strangely, the Black Cloaked Envoy shows up just in time to save them.

Chief Zhao and the Black Cloaked Envoy go underground to find the book. Chief Zhao’s father comes for a surprise inspection and takes over the department on a case involving strange earth movements. It is revealed how Guo was brought into the department.

Cong Bo finds a fight club but all is not as it seems. Old Chu and Guo are sent to investigate and ends up in participating in the fight club. There they find another undergrounder. Shen Wei and Chief Zhao are not far behind only to find there is a connection with Zhu Jiu.

The Special Investigations group makes Guo an official member. Lin Jing makes a special weapon for Guo. Chief Zhao tries to get on Shen Wei’s good side by giving him some books. The Black Cloaked Envoy brings a case to the team. The artifact starts to act up.

Zhu Hong’s family kidnaps her and Gao. The group tries to solve a mass suicide that they believe is murder. They come across a man trying to save a little girl who was abused by her father. The group figure out who the real culprit is but will they stop the Zhu Jiu from getting the artifacts?

The reporter now is a threat to the Special Investigations group and likely Shen Wei. It turns out Gao was not sent to the group by his uncle. There is something up between Chief Zhao and his father. Shen Wei and Chief Zhao’s friendship continues to strengthen.

Zhu Jiu is back and out to destroy the agency using a man that has a history with Chief Zhao’s father. Chief Zhao and Old Wu run from underground attackers. The Black Cloaked Envoy tries to find Chief Zhao before he is hurt or killed. Shen Wei thinks about quitting being a professor. A new case has sprung up.

Guo rescues a clueless man on the street who says he needs to go to the address of the Special Investigations Unit. It turns out to be the Regent from the Underground and before he can reveal secrets about the Black Cloaked Envoy, Chief Zhao interrupts him and takes him into his office to discuss the issue privately. It appears that a very important book is lost and the Black Cloaked Envoy is very angry.

Whan Zheng is having vision of her life before SID. On the way northwest SID runs into Shen Wei and his students, and together they head up the mountain. They're told about the Hanga tribe, and Wang Zheng recovers her memories.

The team must rescue Wang Zheng with help of course from the Black Cloaked Envoy. They rescue Wang Zheng and Sang Zan. After Shen Wei takes a drink, Chief Zhao learns finds some very interesting clues.

The little girl disrupts a wedding in a bad way. Shen Wei is the first on the scene. Chief Zhao starts an argument with Shen Wei to find out the truth of who he is. They are interrupted rescuing a reporter. Shen Wei says he has to do research and leaves. FINALLY, Chief Zhao confirms (like he didn’t already know) who is the Black Cloaked Envoy.

This is the story of how it all began, and Zhao is fascinated to discover his role in it. The kinship he always felt towards Shen Wei was real and true, but everything is overshadowed by a declaration of war coming from Dixing.

A woman is murdered and found without her face, and when Zhao arrives on the scene he finds Shen Wei already there. The woman's friend, Lin Yusen, claims he saw the killer and is determined to avenge his loved one.

Huang Linqi, son to a very rich man, suddenly disappears one night. Soon followed by his betrothed Li Jiaqi. Zhao suspects butler Wu knows more than he's saying, and behind the scenes a plot to cover it all up is being orchestrated.

The special investigations team are looking into a strange disappearance and reappearance of a woman. Guo comforts the fiance of the missing girl surprising Old Chu. Chief Zhao asks Shen Wei for help with the case.

Chief Zhao rescues Shen Wei from a mugging and later one of the criminals turns up dead. Lin Jing figures out the murders are based on a popular web novel. After solving another case, Zhao and Shen Wei share a sweet moment talking about the case.

A student is found aged and dead at the campus, while a university assistant is behaving strangely. A girl with gloves is somehow connected to the case, and Zhao Yunlan has to piece it all together before it's too late.

Strange things are happening at the hospital. It appears that the new artifact is causing a lot of issues with employees attempting suicide. Chief Zhao gets stuck in a real live video game with some devastating consequences. Shen Wei promises to tell Chief Zhao more of their shared past.

Rumors about SID is damaging their reputation in the public eye, and SID tries to do damage control. The biggest target of both the rumors, and their enemy's game, is Chu. Zhao orders Guo to follow Chu, but it's a decision he'll regret.

Both parties are rallying forces to their side as things start to heat up. Ye Zun and Zhao are both using their wits to try and outplay the other, but it won't stay that way. Soon, forces will move that will change things forever.

The four holy tools are gathered, and the SID team prepares to make their move both above and below ground. The Yashou tribes must be dealt with, as must the situation on the human streets, but the worst chaos is down in Dixing.

A hatred that lasted for 10 000 years finally gets to express itself, but on the other side there's love that lasted just as long. This is the endgame between these two powerful forces. How far will they go to reach their end?

There is something changing people’s personality. The new artifact is causing mayhem in Dragon City. Soon the only people not affected on the Special Investigations team are Shen Wei and Chief Zhao as well as Lin Jing. Lin Jing develops a crush on a musician who is not all that she seems.