Shinichi Kudo is Detective Conan

Shinichi Kudo , a brilliant 17-year-old high school student and gifted detective who often works for the police, is attacked by two members of a mysterious crime syndicate while investigating a blackmail case. He is forced to take a newly-developed drug that is supposed to kill him. However, due to a rare and generally unknown side effect, the drug doesn't kill him, but transforms his body into that of his seven-year-old self.

In order to hide his identity and investigate the whereabouts of the syndicate which he later discovers is called the "Black Organization," he adopts the pseudonym Conan Edogawa, moves in with his childhood friend and crush Ran Mouri , because her father is a private investigator whom he thinks may help him find leads about the syndicate, and enrolls in elementary school. He continues investigating criminal cases with Rachel and her father, Kogoro Mouri , who he discovers is rather inept at his job. Shinichi also performs investigations through the Junior Detective League , a group he forms with his friends at the elementary school. As the series progresses, so does the relationship between Shinichi and Ran, though she does not know that Conan is really Shinichi.

Later in the series, Shinichi's investigation into the Black Organization catches him in the crossfire between its members, the FBI, and CIA agents who were sent to investigate them. Shinichi works to capture the members of the Black Organization and to recover his body with the help of a gifted chemist/former member of the Black Organization named Shiho Miyano, codenamed "Sherry." "Sherry" has also taken a dose of the APTX 4869 poison (the same poison which transformed Shinichi into a child), in order to commit suicide. However, it also happens to transform her into a prepubescent little girl instead. Due to this, she is able to escape from the Black Organization and changes her name to Ai Haibara.

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