Shinichi Kudau, a high school student of stunning talent in detective work, is well known to solve many challenging matters. One day, when Shinichi spots two suspected men and decides to follow them, he inadvertently witnesses a distracted illegal activity. Unfortunately, he is trapped in the Act, so the men give him a dose with an experimental drug prepared by his criminal organization, leaving him for his death. However, for his own amazement, Shinichi lives to see another day, but now a seven -year -old child is in the body.
Perfectly preserving his original intelligence, he hides his real identity from everyone, in which his childhood friend included Mauri and his father, private detective Kogoru Moori. To end this, he takes the mystery authors Arthur Conan Doyle and Ranpo Edogwa, carrying on the surname of Conan Adogwa.
Shinichi, as Conan, starts to secretly resolve senior mauries from behind the curtain with its still exceptional slehing skills, while someday expecting to reverse the effect of the drug, its current state Is investigating the organization responsible for.
