Jungkook has to solve a new murder case. Taehyung is the victim's older, and very much Catholic, brother.  Cue a lot of tension, some ty humour and a whole bunch of repressed emotions. 

Hara's new stepbrother, Jungkook, thinks she's a gold digger.  Hara is just waiting for her 18th birthday so she can haul without child protection services hunting her down.