Episodes
1. Just Another Meaningless DayYoo Dong-man goes undercover to root out illegal gambling. Kang Sun-ho steals money from criminals to pay for his father’s cancer treatment.
2. Sun-ho Meets Dong-man AgainOh Kang-hui witnesses her mom’s arrest. When training begins at the university, Dong-man appoints Sun-ho a leader, set on flunking him.
3. Nothing Is ImpossibleDetermined to bring victory to his team, Sun-ho asks Dong-man for advice. The final assignment comes with a twist.
4. No Hard EvidenceSun-ho gets grilled in class. Kang-hui’s personal life is made public on the school website. Dong-man feels out the police chief.
5. The DuoDong-man grows suspicious of a fellow professor. With Sun-ho by his side, he scopes out the scene of the crime to check out an alibi.
6. The BlackoutAnother potential culprit appears on Dong-man’s radar. Sun-ho struggles to remember the events of the night before. The campus hosts a field day.
7. The DisappointmentSun-ho finds Park Cheol-jin suspect, but Dong-man is determined to keep him off the watch list. Kang-hui attends her mom's trial.
8. The CulpritCheol-jin finds himself in an even deeper rut when he's cornered by Sun-ho and Dong-man. A cheating scandal breaks out during the final exams.
9. The ConfessionCheol-jin falls into a trap. Dong-man takes a closer look into Ko Deok-bae’s business. Kang-hui insists on joining Sun-ho in the investigation.
10. Sun-ho’s Investigation TeamSun-ho and his friends track the location of the burner phone. The professors step in to protect their students from further danger.
11. The Case ClosedSun-ho gets Kang-hui a gift, but hesitates to give it to her. A critical piece of evidence is missing. Dong-man spots a colleague at the precinct.
12. The Enemy WithinSun-ho’s criminal history comes back to haunt him. Learning of Choi Hui-su’s connections to the case, Dong-man leans on his gut and tails her.
13. Sun-ho’s CounterattackSun-ho acquires a key to a safe, Kang-hui calls it quits and Dong-man gets eyes on the chief. Stronger curfews and regulations are enforced on campus.
14. The LedgerWith his hands on the ledger, Dong-man is sure that he's pinned down the culprit. Sun-ho gets arrested for conspiring with Jang Jae-gyu.
15. The Head Operator Of The ZelkovThe police look for incriminating evidence against Han Jeong-sik. The truth behind the foundation finally comes to light.
16. The Hacker Sun-hoSun-ho completes one final hacking job before dropping out of school. He turns himself in for his past crimes so he can return with a clean slate.
