Seeming as how I haven't seen the anime, but wish to one day that I'm free enough to watch something new, my opinion may be based. There are two episodes, however they don't seem to capture a lot of the 'detective' role. Granted, there is a lot of thinking behind the schemes and figuring them out and perhaps my reasoning is based on there only being two episodes, I just think there needs to be more. Over all, it was very good. The following synopsis is taken from
MySoju.com, where you can find the links to watch the film with subtitles.
Description: This tanpatsu celebrates the tenth year of this popular Japanese anime, originally a manga created by Aoyama Gosho. The story takes place when Shinichi was still a high school student. The talented young detective Kudo Shinichi receives a message: "I will kidnap one of your classmates during your class trip." Shinichi is going to find out the truth.