Case Unsolved

The mother of a 9-year-old kid named Shawn Spade was been shot in front of him by a man covered in white clothes. 10 years later he was invited to be one of a student of a Prestigious school, BloodHound University (BHU), however, he declines the offer for some reason. One day, he met the people who killed her mother and they are trying to kill him. Satorou Harashi, a detective who was graduated from BHU saved him and he owes his life to him that's why he accepted the offer and become one of the students of BloodHound University where his life for being a detective started.