Meitantei Conan Movie 04: Hitomi no Naka no Ansatsusha

Conan witnesses the aftermath of a police officer's murder, and the case becomes more alarming when other officers are attacked in quick succession. The victims appear connected by a secret the police are reluctant to discuss, suggesting that the killer may be frighteningly close to the investigation itself.

During another attack, Ran sees the murderer and is traumatized badly enough to lose her memories. Unable to remember Conan, her family, or even the face of the person now hunting her, she becomes the case's most vulnerable witness. Conan must uncover the pattern behind the killings and protect Ran before the assassin can silence her permanently.