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1. Episode 1

Air Date: 2018-05-25

Kang Dong Soo meets Yoo Shi Hyun when she mysteriously shows up and saves his life. When he finds a sketch of a ring he recognizes in her notebook, Dong Soo goes looking for Shi Hyun.

2. Shi Hyun convinces Jin Young to tell her story. Will Dong Soo be able to save Ji Soo?

Air Date: 2018-05-26

3. Shi Hyun and her team investigate the murder. Do Jin gets his next assignment.

Air Date: 2018-06-01

4. Episode 4

Air Date: 2018-06-02

The team struggles to locate Dong Soo before he does something drastic.

5. Dong Soo agrees to help find Shi Hyun.

Air Date: 2018-06-08

6. Episode 6

Air Date: 2018-06-09

Nam Sun Ho puts his plan in motion. Chief Moon agrees to join forces with Dong Soo for this case.

7. Episode 7

Air Date: 2018-06-15

Nam Sun Ho's plan does not work out the way he expected. The team has a new case.

8. Episode 8

Air Date: 2018-06-16

Dong Soo thinks he has figured out what is going on until Baek Woo Jin tells him that there is much more to it.

9. Episode 9

Air Date: 2018-06-22

The team tries to figure out how they are going to find Tae Joon's notebook, but does it hold the answers they are looking for?

10. Episode 10

Air Date: 2018-06-23

Tae Joon offers Do Jin an opportunity to meet the man in charge. Shi Hyun has to decide what she is willing to sacrifice for her brother.

11. Episode 11

Air Date: 2018-06-29

Dong Soo and Shi Hyun investigate a case from 20 years ago and race to stop Do Jin.

12. Episode 12

Air Date: 2018-06-30

Park Moon Ki asks to meet the Elder. Shi Hyun draws the funeral of someone on the team.

13. Episode 13

Air Date: 2018-07-06

Dong Soo and Shi Hyun try to find out what Yoon Sung Soo knows. Park Moon Ki demands answers.

14. Episode 14

Air Date: 2018-07-07

Dong Soo tells Young Shim his theory. Now they need to find some evidence to back it up.

15. Episode 15

Air Date: 2018-07-13

Tae Joon is determined to prevent Tae Wook from contacting the Elder. Park Moon Ki finally gets to meet the Elder.

16. Episode 16

Air Date: 2018-07-14

As more facts are exposed, Shi Joon's mission becomes more and more challenging.