Episode 17 recap: Here is the summary in smooth and idiomatic English:

Title: Chen the Inspector Reveals His Role in Assisting the Arrest of Sun YunxiaoIn Episode 17, Lei Xu and Du Ziyu unfortunately fell into the hands of Lawyer Zhang, putting them in grave danger. Du Ziyu revealed that Sun Yunxiao might be taking the fall for someone else, and they seemed to be the only ones privy to this information. Before they could say more, they were pushed to the edge of a pit, their lives hanging by a thread. At that moment, Lei Xu's colleague called to inform him that the vehicle's license plate had been traced back to Sun Yunxiao.

Lei Xu quickly decided to use the recording to confirm the identity, and sought assistance from his colleagues. Meanwhile, Zhu Jie met with Inspector Liu, regretting having transferred Lei Xu to Jiping, while Liu had already anticipated Lei Xu's capabilities, not expecting him to uncover the core of the case. They discussed a strategy, deciding to handle the situation carefully regardless of whether the case was reopened.

Using the license plate clue left by Yang Tian, Lei Xu guided Du Ziyu to discover the connection between her and Sun Yunxiao, realizing that Sun might be the key to unraveling the mystery. Lei Xu instructed Du Ziyu to continue investigating the Shen Yueer case, while he himself decided to visit his old friend Ding Yonggong, as Qingming was approaching.

At the Ding residence, Lei Xu recalled Ding Yonggong's recording mentioning Zhu Jie's grave crimes and the car model in Ding Shuai's possession, which made him suspicious and determined to investigate further. Ding's wife facilitated Lei Xu's search by taking Ding Shuai away, allowing him to focus.

Meanwhile, Zhang Li and Liu Liu's discovery brought a new lead to the case: Chen the Inspector had sought a rare and expensive targeted drug for his mother, becoming a key piece of evidence.

Du Ziyu confronted Chen the Inspector, questioning his involvement in taking the fall for Sun Yunxiao. Chen admitted being used by Zhu Jie but was unaware of the mastermind, only knowing that the person was of high status. Feeling guilty, he decided to sever ties with Du Ziyu before turning himself in.

Lei Xu, lost in his search at the Ding residence, finally found the crucial evidence among the car models. However, just as he was about to leave, he was ambushed and knocked unconscious. Zhu Jie, learning of Sun Yunxiao's ambitions, furiously went to confront him, while Lei Xu was bound next to the pit, facing Lawyer Zhang's taunts and impending doom. At the critical moment, Du Ziyu's call became a turning point, as she sensed something amiss and immediately sought help from Zhang Li and the police.

Zhu Jie vented his rage on Sun Yunxiao's betrayal and assaulted him. But when Sun Yunxiao received Chen's call, thinking he could escape, he was unaware that the police net was closing in on him. In this intricate struggle, the fate of each character seemed to be tightly bound by an invisible web, with truth and justice gradually closing in.