Yubin's team investigates the theft of the "Chungwoonsansudo" painting from Professor Kim's collection, focusing on those with access to his home.

Yubin arrests a suspect who reveals that someone else has stolen the painting. The team goes undercover to catch the real culprit.

The Violent Crimes Unit tackles an illegal gambling case, uncovering the MZ Union. Yubin forms the Dongbang Group to catch the leader.