Поганий і божевільний

After getting an officer suspended from service, Ryu Su-yeol gets a step closer to a promotion; Oh Gyeong-tae looks for a young girl's missing mom.

Su-yeol retraces Gyeong-tae's steps while tracking down the man in the helmet; Lee Hui-gyeom goes after a necklace that may hold crucial evidence.

Su-yeol falls from Do Yu-gon's good graces; while searching for the necklace at home, Su-yeol finds a collection of objects that are not his.

After ensuring Gyeong-tae's safety, Su-yeol pulls a dirty move; with Kim Gye-sik back on the force, the narcotics unit tracks down a street drug.

Su-yeol searches high and low to prove Hui-gyeom's innocence; the deeper he dives into the case, the closer he comes to falling into a trap.

Su-yeol teams up with K to investigate quietly and uncover the opponent's weakness; the body count continues to grow.