In the latest episode of SBS's "Taxi Driver 2," Lee Je-hoon's character, Kim Do-gi, decides to uncover the truth behind a police officer's death and the corruption at Club Black Sun.

During the episode aired on the afternoon of April 1st, Kim Do-gi infiltrates Club Black Sun but is arrested on charges of sexually assaulting an employee. Thanks to the help of reporter Kim Yong-min (played by Baek Su-jang), he is released from the police station and is selected as a guard to ensure a deeper infiltration into the club.

However, a woman is carried out of Black Sun, and Kim Yong-min and Kim Do-gi take her to the hospital, where they learn of her positive drug test results. Kim Yong-min explains to Kim Do-gi, "If we had left her alone, she would have been dragged somewhere without knowing and suffered terrible things. Reporting to the police wouldn't change anything. She might even become a perpetrator under false charges."

Kim Do-gi then asks Kim Yong-min why he is tracking Black Sun. Kim Yong-min confesses, "I ruined everything. Someone died because of me. Choi Sung-eun was one of the few real police officers I knew, and it wasn't suicide. Someone killed her and staged it to look like suicide. If only I hadn't given her that tip a year ago."

It turns out that Kim Yong-min had tipped off Detective Choi Sung-eun about drug distribution allegations related to Club Black Sun. Choi Sung-eun, who was investigating the club at Kim Yong-min's request, was found dead after leaving an urgent phone call. Fellow police officers concluded it was a suicide case, but Kim Yong-min insisted she was murdered.

Feeling guilty for believing that Detective Choi would still be alive if he hadn't reported the Black Sun scandal, Kim Yong-min and the Rainbow Transport family decide to join forces to pursue the truth behind Club Black Sun.