Case Closed #17
In "Immovable Proof," Conan pieces together a cryptic message hidden in the ticking of clocks, but the real mystery deepens when he uncovers a figure locked away in the attic—someone everyone insists isn't there. Written by Gosho Aoyama and Naoko Amemiya, with art and inks by Aoyama, this 2007 Case Closed issue blends clever deduction with lingering unease. The cover, a collaborative effort by Aoyama and Andrea Rice, captures the tension of secrets in plain sight.
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Conan deduces that the clocks are giving off a code as a clue to the mystery. But it doesn't tell him anything about the mysterious person locked in the attic that everyone denies exists.
Plot details indexed by the Grand Comics Database (CC BY-SA).