1. Just Another Meaningless Day

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. 9 August 2021. 62 min

Yoo 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 Again

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. 10 August 2021. 62 min

Oh 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 Impossible

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. 16 August 2021. 62 min

Determined to bring victory to his team, Sun-ho asks Dong-man for advice. The final assignment comes with a twist.

4. No Hard Evidence

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. 17 August 2021. 62 min

Sun-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 Duo

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. 23 August 2021. 62 min

Dong-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 Blackout

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. 24 August 2021. 62 min

Another 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 Disappointment

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. 30 August 2021. 62 min

Sun-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 Culprit

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. 31 August 2021. 62 min

Cheol-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 Confession

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. 6 September 2021. 63 min

Cheol-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 Team

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. 7 September 2021. 64 min

Sun-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 Closed

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. 13 September 2021. 67 min

Sun-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 Within

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. 14 September 2021. 62 min

Sun-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 Counterattack

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. 27 September 2021. 66 min

Sun-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 Ledger

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. 28 September 2021. 66 min

With 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 Zelkov

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. 4 October 2021. 66 min

The police look for incriminating evidence against Han Jeong-sik. The truth behind the foundation finally comes to light.

16. The Hacker Sun-ho

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. 5 October 2021. 64 min

Sun-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.