My sister was murdered ten years ago. The murderer has not yet been found. We don't even know if he exists. There are no clues or witnesses at the murder scene. The only thing that can be found is a ghost card. In order to find "him", I started to work as a private detective while taking on difficult cases while tracking down the clues of the "non-existent criminal"...
Purpose: Detect cases and find the real culprits