Because of Kudo Shinichi's help, Maori Kogoro has recently gained a reputation, so the business of the detective agency is obviously better and better.
No, another doctor came to him to solve the case.
It turned out that the doctor had received money and toys from unknown people almost every month for nearly two years, and the strangest thing was that he had received a lot of money this month.
Therefore, the doctor came to Maori Kogoro to help him find out why.
However, as far as Maori Kogoro's brain is concerned, how can he analyze the reason?
Fortunately, There is Kudo Shinichi next to him, and for this reason, the doctor also praised Maori Kogoro for being very powerful.
However, this also allows Maoriland to discover some secrets, that is, she thinks that Conan is Kudo Shinichi.
In order to find out the mystery, Kudo Shinichi followed Maori Kogoro to the doctor's hospital.
Because Kudo Shinichi became small, he had to secretly find clues by himself.
However, all this has been discovered by Maoriland, and it is even more certain that Conan is Kudo Shinichi.
But in the face of Maoriland's questioning, Kudo Shinichi of course could not admit it.
After some searching, Kudo Shinichi finally found a clue.
It turns out that the money and toys are the father of a patient that the doctor once treated, Mr. Diye.
It turned out that Mr. DiYe had always believed that his son's death was due to the doctor's death.
So in order to get revenge on the doctor, he sent his son's toys to the doctor every month.
In the end, he also wanted to take revenge on the doctor's son, but at the last moment, Kudo Shinichi appeared in time to stop a tragedy.
In this way, Kudo Shinichi solved the monthly gift threat incident.