The investigation of Ma Rongrong brings connections of illegal labouring in a trading company called Golden Fields, a exportation company used by Ye Corporation for their products including their knives production. At the province police station (that is in charge of Ma Rongrong's case) Ji Bai explains his deductive reasoning when he notices Yao Meng's injured hand and applies a ointment on it. However, Zhao Han was disappointed to not be able to help her because he likes her. Meanwhile Xu Xu is trying to find the connection between all to Ye Zi and Shiyong's case during throughout her training, and using her sketches as sort of a journal. The whole team except for Xu Xu goes and captures Chen Yong who is the murderer of the deaf-mute girl, and leads to the rescue of two girls being held captive and a second suspect arrested as well. Ji Bai is able to get Chen Yong to tell them about his connections. Afterwards, Ji Bai receives a text from Zixi needing help, but no answer when he calls her back.