A 30 year old Japanese man named Chung Takahashi lives in an apartment with his grandpa in Brooklyn New York. His grandpa who is a police officer is later discovered to be a top secret detective after he was murdered by mysterious burglars. Chung decided to carry his grandpas legacy to join the TGA (The Global Agency) to solve cases he has never done before. He goes on missions to solve mysterious crimes to become the worlds greatest detective.