Kudo Shinichi is a genius detective who, although being only 17 years old, is known as the “savior of the Japanese police.” One day, at an amusement park where he was having a date with Mori Ran, his childhood friend and classmate, he witnesses a man in a black suit secretly making a deal with another man. Just then, he’s caught by another man in black and is forced to take a drug. Luckily the drug does not kill him, but when he comes to his senses, his body has shrunk to the size of a 6-year-old boy.

Thinking the men and their underground organization would come for his life if they found out he was alive, Shinichi consults with Dr. Agasa, an inventor living next door, and decides to hide his true identity. Shinichi calls himself Conan Edogawa and, at Dr. Agasa’s suggestion, starts living at the home of his girlfriend Ran, whose father, Mori Kogoro, is a private detective. Conan hopes that by living with them, he may be able to find out about the organization and discover a way to regain his former body.

Conan now looks like an elementary school kid, but his mind and intellect are Shinichi himself. So, while attending elementary school, he solves one mysterious case after another with his excellent reasoning powers. Kogoro, who is not very sharp-witted, wins fame as a great detective thanks to Conan’s help from behind the scenes.

Supporting Conan’s detective work are Dr. Agasa’s inventions. A boy who loves the series says, “It’s great how Dr. Agasa makes lots of interesting tools for Conan, like the stun-gun wristwatch, solar-powered skateboard, criminal locator glasses, and power-assisted kick shoes.