Episode 17 recap: Wang Su Fang passed away, and Ma Kui and Wang Xin went undercover together.

Wang Xin thought that this time Ma Kui would praise him, but he didn't expect Ma Kui to scold him and blame Wang Xin and others for deceiving them for so many days before catching the fraudsters, saying that their abilities weren't that great. Since Wang Xin didn't receive any praise, he wanted to ask about the matter of returning to Ningyang, but Ma Kui still asked him to continue patrolling in Hongyang.

Yao Yu Ling followed Niu Da Li every day to learn how to ride a bicycle and fell a few times, but she eventually learned. Once Yao Yu Ling learned how to ride a bicycle, she wanted to leave Niu Da Li behind and go to the department store by herself, but she fell shortly after starting to ride.

Yao Yu Ling got injured, so Niu Da Li had to carry her back home along with the bicycle. Yao Yu Ling kept scolding Niu Da Li, saying that he bought a faulty bicycle. Niu Da Li carried Yao Yu Ling back and greeted people in the courtyard, wanting everyone to know that he was carrying Yao Yu Ling while she had a big fall.

Yao Yu Ling felt extremely embarrassed and was eager to go back to her room, but Niu Da Li kept talking nonstop, which she couldn't stand. After returning to the room, Yao Yu Ling wanted Niu Da Li to leave, but Niu Da Li was worried that she hadn't eaten, so he went to cook for her.

Niu Da Li cooked the meal, and Yao Yu Ling took a few bites but asked him to leave again. Niu Da Li tried to find various excuses to stay and take care of Yao Yu Ling. Yao Yu Ling insisted that he leave, so Niu Da Li requested that she finish the meal before he would go.

Niu Da Li carried Yao Yu Ling on his back, and Cai Da Nian and Wu Zhang Gui started teasing Niu Da Li, thinking that he had schemed and secretly loosened the screws to make Yao Yu Ling fall.

When Ma Kui returned from work, Wang Su Fang fainted again at home, and only the young Ma Jian was there, unsure of what to do. Ma Kui took Wang Su Fang to the hospital, and Director Liu, because Wang Su Fang's condition worsened with cancer metastasis, couldn't keep it from Ma Kui any longer and told him the truth.

Ma Kui felt a deep sense of self-blame upon learning about Wang Su Fang's condition. He blamed Wang Su Fang for hiding the truth from him, but more than that, he was afraid, afraid that Wang Su Fang would leave him like this. He didn't know what to do. When Wang Su Fang woke up, she entrusted Ma Yan with the family matters, asking Ma Yan to support the family in her place.

Wang Xin learned that Wang Su Fang was ill and hurried to the hospital to see her. In front of Wang Xin, Wang Su Fang advised Ma Yan to change her temper and asked Wang Xin to be more patient with Ma Yan in the future.

Wang Su Fang entrusted the family matters to Ma Kui, asking him to take good care of Ma Jian. She also requested that if one day Ma Kui and Wang Yong Ge's issues were exposed, Ma Kui should forgive Wang Yong Ge and not hold onto any grudges.

Ma Kui couldn't bear to part with Wang Su Fang and cried while holding her. He told her to rest well and assured her that cancer was not terrifying, and she would be able to overcome it. Ma Kui shared the painful years he had endured during the past decade because of Wang Su Fang, describing a beautiful future for them. However, Wang Su Fang couldn't hold on any longer and passed away.

After Wang Su Fang's passing, Ma Kui spent each day in self-blame. He couldn't forget Wang Su Fang and couldn't accept a life without her. Ma Yan grew up quickly after Wang Su Fang's passing. Like Wang Su Fang before, she took care of the family and looked after Ma Kui and Ma Jian.

Ma Kui prepared to return to work for a meeting, but there was no one to take care of Ma Jian at home. He planned to send Ma Jian to Ma Yan's place, but unexpectedly, Ma Yan took leave and returned home early. Ma Kui carried Ma Jian on his back and scolded Ma Yan, asking her to cherish her job as a salesperson and take better care of Ma Jian.

A group of drug traffickers appeared on the Ningha Line, and the higher-ups requested Ma Kui to go undercover on the train to catch them. Ma Kui requested Wang Xin to be his assistant. Ma Kui went undercover on the train, discreetly playing the role of a passenger. Even Hou San Jin, who passed by, didn't recognize him, but his old friend Peng Ming Jie did.

Peng Ming Jie called Ma Kui to a corner, and they happily caught up and exchanged contact information. While Wang Xin was undercover, a thief tried to steal his bag, but Wang Xin caught him red-handed. Wang Xin handed the thief over to Xiao Hu without revealing his own identity. After interrogating the thief, Xiao Hu had a brief conversation with Wang Xin.

Observing Xiao Hu flattering Ma Kui, Wang Xin talked to Xiao Hu about Ma Kui and learned that Ma Kui never scolded Xiao Hu. Wang Xin felt uneasy about this.