IFILTRATOR-BANGCHAN FF-MAFIA AU

Y/n is a respected Senior detective in the Korean National police agency. She's prove herself to be a great officer ever since she joined her work force. But there is one case that just might end everything for her. As she takes on the case to bring down South Korea's most notorious and feared gang, as an undercover gang member, she find's herself being closely watched by the gang's leader. Did he suspect her already? Or was it something more?......