Key is a young detective investing the newest case to his desk. The case being the investigation of the newest murder dubbed with the name, "The Sakura Killer." This killer has started a killing spree of specific vicitims within the last moth in Seoul. At every crime scene each victim has a tattoo of a Sakura Blossom on their chest. What could it mean, though? Well that's the question Key has been trying to figure out. He can only comes up with one thing though...the possibility of it being a message. To who, though and what could it mean? Also, what happens when he comes face to face with said killer? Will he turn this man in, or will he simply let him go...?