Shiho creates the antidote and gives it to Shinichi. Unknown to them Agasa made plans for everyone to go on vacation. Shinichi decides not to wait and takes the antidote which then becomes the cause of the Detective Boys kidnapping. Angry with his decision, Shiho takes things into her own hands and has the help of an unexpected and dangerous associate - Raymond Redington.

Kudo Shinichi just turned 18 and now he and his friends can head down to his mother's club; Murderous Rough. What awaits the detective is a mystery unsolved for the past 18 years and a secret that he may not be ready for…