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.

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

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

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

Dong Soo agrees to help find Shi Hyun.

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