"Catch The Ghost" follows Yoo Ryung, a young cop that starts working in the Subway Police with the purpose of finding her twin sister that disappeared and it is most likely a victim of the subway killer, a serial killer that targets people on the subway and leaves their bodies inside the train.

The chemistry between Yoo Ryung and Ji Seok is really good, but the drama doesn't give the couple a chance to be together, literally that happens only at the ending and for me, that wasn't enough. They do have some sweet moments.

Yoo Ryung's journey to find her sister is the main focus of the drama, along with her solving the cases with a lot of enthusiasm, she's a lively character and always gives great scenes, with her crazy ways to stop the criminals, dragging poor Ji Seok along. I think the drama should have put more effort into showing the relationship of Yoo Ryung and Yoo Jin, we only see little flashes of their lifes together and to understand Yoo Ryung's pain and how could she do that mistake, of leaving her autistic sister behind, it should have more background on the story about them.

The funny moments it's what makes this drama worthwhile, also the friendship between the Subway Police. The romance stays in second place, but still a really good drama.