The main protagonist tries to help the police catch a killer that kidnapped and murdered his childhood schoolmate 15 years ago.
When the main protagonist was a child, his childhood schoolmate got kidnapped by a women and the police accused a man. He has been trying to tell the police but they didn't listen. 15 years later, he has gotten a radio which connects to a policeman from the past who tells him that he has discovered clues about the case which he hasn't heard of before.