Locked-room mysteries are the soul of golden-age detective fiction. Here, the challenge is twofold: How was the room sealed from the inside? And how did a flaming arrow strike a man with surgical precision without setting the entire room ablaze? Conan’s inner monologue as he inspects the ceiling, the floorboards, and the victim’s clothing is a masterclass in noticing the one weird detail —a small, melted piece of metal that doesn’t belong.
Have you seen Episode 717? What was your theory about the locked-room trick before the solution was revealed? Detective Conan Episode 717
If you’re a fan of Detective Conan ’s more grounded, puzzle-box mysteries—episodes like The Naniwa Serial Murder Case or The Moonlight Sonata —do not skip Episode 717. It is a reminder that even after 700 episodes, the series can still make you believe, for 25 minutes, that a demon truly exists. Now, on to Part 2, where Conan (and a certain sleepy-eyed detective via the Kogoro proxy) will unmask the very human devil behind the flame. Locked-room mysteries are the soul of golden-age detective