Season 1

A young hacker, who has never wanted anything out of life, goes to a police academy to figure himself out and help a cop take down a gambling ring.

1. 

   1. Just Another Meaningless Day

   2021-08-09 · 62m

   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. 

   2. Sun-ho Meets Dong-man Again

   2021-08-10 · 62m

   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. 

   3. Nothing Is Impossible

   2021-08-16 · 62m

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

4. 

   4. No Hard Evidence

   2021-08-17 · 62m

   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. 

   5. The Duo

   2021-08-23 · 62m

   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. 

   6. The Blackout

   2021-08-24 · 62m

   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. 

   7. The Disappointment

   2021-08-30 · 62m

   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. 

   8. The Culprit

   2021-08-31 · 62m

   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. 

   9. The Confession

   2021-09-06 · 63m

   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. 

    10. Sun-ho’s Investigation Team

    2021-09-07 · 64m

    Sun-ho and his friends track the location of the burner phone. The professors step in to protect their students from further danger.

11. 

    11. The Case Closed

    2021-09-13 · 67m

    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. 

    12. The Enemy Within

    2021-09-14 · 62m

    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. 

    13. Sun-ho’s Counterattack

    2021-09-27 · 66m

    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. 

    14. The Ledger

    2021-09-28 · 66m

    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. 

    15. The Head Operator Of The Zelkov

    2021-10-04 · 66m

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

16. 

    16. The Hacker Sun-ho

    2021-10-05 · 64m

    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.