Connection

The story, without spoilers

Someone causes a narcotics unit detective to become addicted to drugs. What is the connection between them?

Cast & characters

Ji Sung

Jang Jae-gyeong

Jeon Mi-do

Oh Yoon-jin

Lee Hyun So

Park Joon-Seo (teen)

Kwon Yul

Park Tae-jin

Kim Kyung-nam

Won Jong-soo

Lee Sang-jun

Kim U-sung