Ep. 623: The culprits hunt for remaining children while Conan signals the Detective Boys via fire codes.

623

After securing their initial position, the kidnappers plan to trap the victim's daughter, lock her inside, and burn the building to eliminate witnesses. Conan and Ai are tied up in a fourth-floor room, while Ayumi, Mitsuhiko, and Genta hide in a nearby locker, overhearing the criminals. Conan uses his Detective Boys Badge to tap out Tokyo Fire Department emergency codes. The hidden children decipher the messages using Mitsuhiko's notebook and realize they must use their scattered cell phones to play specific ringtones that match the code wallpapers. This chaotic audio sequence successfully distracts the culprits, causing one to leave the room. Conan incapacitates the remaining guard with his tranquilizer watch, but the accomplice has encountered an unknown figure on the stairs, leading to ominous approaching footsteps.