Unlock the Boss S01E04 - Episode 4

In Sung and Se Yun now shares the secret about Sun Joo trapped in a smartphone. The closer they get to the truth, the bigger the suspicion against him grows. Bumyoung's executive director, Mi Ran's advice, "Don't trust Kim Sun Joo too much" keeps bothering In Sung, and he ends up checking out the place where Sun Joo went missing. There, he encounters a mysterious man