Detective Conan Kudou Shinichi and Conan are the same person.
When Kudou Shinichi, a high school detective, went to the playground with Mao Lilan, a childhood friend, he inadvertently witnessed the mysterious underground transaction of men in black. He was so intent on peeking that he didn't notice the black man's partner who approached quietly from behind. After being knocked unconscious, he forced the mysterious medicine-APTX 4869.
When he woke up, he found that his body had turned into a child. In order to restore his body to its original state and find an antidote, Kudou Shinichi began to try to hide his identity at the suggestion of Agasa Hiroshi. When Xiaolan asked for the name, she saw Edogawa Rampo and Conan Doyle on the bookshelf, named Edogawa Conan.
The story of Detective Conan:
Kudou Shinichi, a high school detective with the father of a world-class mystery novelist. Having solved many difficult cases, he witnessed the mysterious black man's transaction one day while dating his childhood friend Mao Lilan! In order to silence the witness, Shinichi was poisoned. Although he barely saved his life, he became a child ... If the organization knows that Kudou Shinichi is still alive, even the people around him will be in danger!
he went on solving difficult cases under the alias of "Edogawa Conan". All this is to find out the true face of the mysterious organization and restore myself as Kudou Shinichi ... There will be no unsolved mysteries in this world! A detective who knows everything, there is always only one truth.