Connection: 1x1

Episode 1

Jang Jae Kyung is the Anhyun Police Station’s Narcotics Unit’s ace. One day, while pursuing drug dealers, Park Jun Seo, a friend who hasn’t been in contact for 20 years, comes to visit him. The following day, Jun Seo’s cold body is discovered, and Jae Kyung gets abducted and forced to become addicted to an unknown drug.