One day, as he was taking a ride in the rollercoaster with his girlfriend, Ran Mouri, a man was killed while he was sitting in the rollercoaster. Because Sanshi is a smart detective, he solved the case in no time and returned to his house with Ran.
But as he was walking by, he saw one of the black men that were in the rollercoaster during the murder. He left Ran without even saying good-bye to her and followed the suspesious guy.
As he was listening to the conversation that was going on, one of the black men hit him on his head and gave him a poison to get rid of him. Instead, the poison failed to work but made Shinichi shrink into Conan Edogawa, as a side effect of the poison.
Now, conan lives with his girlfriend, Ran Mouri, and continue to solve the crimes with Ran's Father, Detective Kogoro.
