Episode 13 recap: Sha Xiao Fei wants to collaborate with Chu Yi Han.

Chu Yi Han received a call from Sha Xiao Fei, who remarked that Chu Yi Han was indeed not dead. Chu Yi Han responded by saying that Sha Xiao Fei was also not dead. Sha Xiao Fei expressed the desire to work together with Chu Yi Han, but Chu Yi Han clarified that Sha Xiao Fei had misunderstood. He was there to apprehend Chu Yi Han, not to collaborate with him.

Chu Yi Han asserted that he was the most suitable candidate for the mission, as he was very familiar with the situation on the other side and had a close relationship with Gu Lin Na. Tha Jing asked Chu Yi Han if he had any ulterior motives regarding Gu Lin Na. Gu Lin Na's uncle told her that the core of the Northwest Wolf consisted of seven individuals, and her father was their leader.

Meanwhile, there was a bomb. Lao Qiang had no intention of hiding but rather aimed to die together with everyone else. Cheng Fan and the others rushed over, and Gu Lin Na brought a blade to discreetly help Chu Yi Han untie himself. Chu Yi Han lunged at Lao Qiang and pushed him down the stairs. He used his clothes to signal Cheng Fan and the others, informing them that there was a bomb and urging everyone to leave quickly.

Lao Qiang pressed the button, and the entire building exploded. Cheng Fan ordered his people to rescue others. Fortunately, Chu Yi Han and Gu Lin Na had taken cover in an iron box and were unharmed. Five months passed, and Chu Yi Han visited the cemetery, deeply saddened, to see Yu Da Luo.

Cheng Fan came to the hospital to see Chu Yi Han, who still had the same hairstyle as when he was in college with Yu Da Luo. Cheng Fan remarked that Yu Da Luo wouldn't want to see Chu Yi Han in his current state and asked Jordan for help in cutting Chu Yi Han's hair.

Cheng Fan inquired if Chu Yi Han had been in contact with Gu Lin Na. Chu Yi Han replied that Gu Lin Na had called the hospital to ask about his condition. Cheng Fan revealed that Gu Lin Na was the daughter of Guo Mulan and was under their 24-hour surveillance. He advised Chu Yi Han not to mistake his sympathetic reaction for Gu Lin Na as genuine affection.

Chu Yi Han received a call from Sha Xiao Fei, who commented that Chu Yi Han was indeed not dead. Chu Yi Han responded by saying that Sha Xiao Fei was also not dead. Sha Xiao Fei expressed the desire to collaborate with Chu Yi Han, but Chu Yi Han clarified that Sha Xiao Fei had misunderstood. He was there to apprehend Chu Yi Han, not to collaborate with him.

Sha Xiao Fei stated that she knew where Chu Yi Han's mother was and asked if Chu Yi Han was willing to abandon his own mother.

Sha Xiao Fei mentioned that she was in a car downstairs. Cheng Fan sent a message to have someone check and went downstairs with Jordan to investigate. However, there was no one in the car.

Sha Xiao Fei claimed that Chu Yi Han didn't want to save his mother and that she wanted to rescue the seventh aunt. Chu Yi Han asked her to provide an address so he could meet her there. When Chu Yi Han returned, he stated that he was the most suitable candidate for the mission as he was very familiar with the situation there and had a good relationship with Gu Lin Na. Now they could lure out Gu Mu Lan.

Tha Jing asked Chu Yi Han if he had any personal motives regarding Gu Lin Na. Cheng Fan believed that Chu Yi Han's current physical condition was not suitable for the task, and he was already exposed. Chu Yi Han acknowledged this and mentioned that the doctor had informed him of his ruptured thigh tendon, which would prevent him from returning to a normal life. However, being a detective wasn't solely reliant on combat skills.

Tha Jing showed Chu Yi Han the evidence they found at the Western Grand Hotel, including a video recorded by Lao Qiang. Lao Qiang listed three crimes committed by Sha Xiao Fei. He mentioned that Sha Xiao Fei had a fondness for guns since she was a child and eventually acquired her own gun, but she accepted it under duress. He also mentioned other incidents where he forced her to act, including the previous kidnapping. Lao Qiang urged them to consider this when determining her sentence.

Tha Jing believed that Chu Yi Han didn't have a sufficient understanding of the cipher, but Chu Yi Han expressed his willingness to learn. Tha Jing mentioned that she would send him an article the next morning. Chu Yi Han studied throughout the night and successfully translated it the following day. Tha Jing challenged Chu Yi Han to spar with Jordan, stating that if they fought evenly, she would allow him to proceed.

While at the temple, Gu Lin Na saw a written prayer with the name "Gu Xiaowen," which had the exact same birthdate and horoscope as her sister. Gu Lin Na returned and asked her uncle and sister, revealing that her sister was actually her biological sibling. She inquired about the whereabouts of their father. Gu Lin Na's sister stated that their father did love them, while their uncle believed he had committed a crime. Gu Lin Na's sister believed it was for the sake of their livelihood.

Gu Lin Na's uncle nearly fainted due to his weak heart, leading Gu Lin Na to realize that she had been too hasty. Her uncle then disclosed that the core of the Northwest Wolf consisted of seven individuals, with her father being the leader. Something happened in '92, and her father sent her sister to the Jiang family.