Kogoro, Ran, and Conan are in a mall when a murder occurs on the third floor. The police arrive and seal the mall preventing people from leaving the third floor and preventing public access to the mall. Conan meets a girl who tells him she saw the culprit wearing a black jacket. Conan notices that two gangsters are desperately trying to enter the mall to escort their boss. Conan realizes where the culprit is and reveals to Haibara that the culprits motive was to prevent the gangsters from entering the mall so he could murder their boss. Conan explains that since the gangsters sent their boss a voicemail, it means their boss is on the third floor and in a place where phones are not allowed. Conan finds a black jacket in a dental clinic and manages to stop the culprit from murderer the boss. The culprit reveals that the boss was the cause of a Hit and Run accident which resulted in the death of his girlfriend. The police then apprehend the culprit and takes the boss in for questioning in the hit and run.