During a break in the filming, the star was discovered with his throat slit, with Ruri over the body and her hands bloody. No murder weapon could be found. The immediate suspects were members of the cast, including Ruri and the Nagumo father-son. While the police invetestigate, Conan gave little hint Kogoro to the murder revealing Ruri to the murderer. However, Kogoro reveals that Ruri is not the culprit but protects the one who killed the victim. After disclose of deduction, Ruri admits all the truth with deep sigh and prevailed the culprit to give up.