Meitantei Conan: Shikkoku no Chaser

The plot is shinichi gets involved in a case that involves an accident from the previous year; however, the case is tied to the black organization who gave shinichi a drug that shrunk him.

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Kudou Shinichi is living his life as Edogawa Conan, but those days seem like they might end pretty soon. The Black Syndicate is coming dangerously close to learning the truth about Shinichi having survived. Conan and everybody around him may end up dead if he doesn't manage to find Irish—a member of the Black Organization who has infiltrated the police forces, currently investigating a big serial murder case.

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Following a string of six murders, the police have set up a meeting with Kogorou and officers from various prefectures in order to solve the case. Afterwards, Conan realizes that the Black Corporation - who fed him the Apotoxin-4869 that turned him into a child - had infiltrated the meeting; he decides to investigate the murders himself and get closer to those who drugged him. After a chance meeting with Vermouth, Conan discovers that one of the murder victims was an undercover agent for the syndicate, and that a memory card containing a database of all their covert envoys is now in the murderer’s possession. Now Conan must discover the identity of the killer and retrieve the data before the corporation, as well as try to find out which officer is actually the disguised agent codenamed ‘Irish’. But with someone secretly investigating him, is Conan’s true identity about to be revealed?