vN's new drama "Circle: Two Worlds Connected" is a sci-fi (SF) suspense story set in Korea in 2017 and 2037. The two eras are different, but there is a mysterious connection. In the poster released, the concept of "Double Track" connecting the present and the future attracts attention. The TV series is divided into two parts. Ryu Jin-yeol plays the male protagonist of part.1, Kim Woo-jin, a college student living in 2017, who conducts a follow-up investigation into a mysterious incident caused by a person from another world. Kim Kang-woo plays the male protagonist of part.2, Kim Joon-hyuk, a detective in 2037, who lives in an ordinary area full of crime and disease and investigates a mysterious incident that occurred in a smart area. The two stories of reality and the future will unfold in one episode.