Seo Kang-joon is a South Korean actor and singer. He is best known for his roles in Watcher (2019), The Third Charm (2018), Are You Human? (2018), Entourage (2016) and Cheese in the Trap (2016).
A tragic affair destroyed the lives of Do Chi-kwang, Kim Yeong-goon and Han Tae-joo. The three join forces and become members of an internal affairs investigation team for the police and try to dig up the truth on who is behind the tragic affair.
