The kidnapper is caught, but SID must deal with the consequences of their plan. Zhao takes the responsibility and the punishment, but before anyone can react the holy tools are at risk and Zhao comes face to face with the real mastermind.
While Shen and Guo are recovering, a powerful enemy takes the center stage. Zhao isn't easily tricked but is forced to move against him prematurely. This takes Zhao to a place of realization and understanding he never thought was possible.
Zhao can't keep his hands off the holy tools, but for once it's a good thing since he discovers the kidnapping of Chu, Guo, and brother Fire. This forces the SID to come up with an elaborate plot to catch the kidnapper before it's too late.
While Zhao and co are down in Dixing researching the Merit brush, the SID team is busy investigating an intrusion at the HQ lab. Zhao also discovers a sad and terrible secret concerning his best friend Shen Wei.
Lin Jing discovers a woman keeps dying again and again, making it a perfect case for SID, but Da Qing thinks he recognize her. This encounter helps Da Qing to unlock the last of his repressed memories and he finally finds himself.
A confrontation with the Merit brush owner only brings more questions than answers. But another break-in at the HQ lab finally lets them figure out what their superiors are up to and brings them closer to a traitor in their midst.
Lin Jing is pulled into a story between three old friends from Dixing, and Zhao must help him out of it. The Merit brush owner decides to make a bold move, giving the SID people a tricky mystery to solve, and Zhao is personally affected.
They're all trying to find a cure for Zhao's ailment, but nothing seems to be wrong with him. Meanwhile, Zhao is having visions of the future, trying to solve everyone's problems, and the SID finds out about Shen Wei's true identity.
They finally find someone who can help Zhao with his ailment, but the cure turns into something else as a holy tool is discovered and they have to go to Dixing to find out more. Meanwhile, Da Qing tries to unlock memories of this Kun Lun.
Most members of SID are affected by a strange kind of virus, making them behave more extreme and out of character, and while Zhao is forced to deal with that he's also trying to solve the latest case at the same time.