Hello, I am Kang Chul. I am the creator of a Detective Agency, with the motto "Who and Why", or “W” for short. It is designed to solve any criminal case and has a 99% success rate. The only case I haven't been able to solve is my family's murders, which I was framed for. I used to be an Olympic shooter but I was banned due to being a suspect.

Kang chul feels suspicion at his world, but is unaware that it is part of a WEBTOON named “W”.