The Locked Room Clockwork (Arc Synopsis)
Tokyo glows in cold rain at dusk. On the 19th floor of Starview Tower, someone’s found an old man dead in his penthouse, the door bolted from inside. It’s a scene that almost feels made for a dare, or a challenge. That’s where we meet our main hero, Kenzo Takeda, a detective who trusts his gut more than gadgets. He solves what cops can’t. At the heart of his style is the rare gift: he recalls every word, smell, face almost perfectly. But do you always wish for such memory?
Kenzo, slim, sharp-eyed and never seen in the same suit twice, catches this case one cool Monday. He can’t turn it down because he lives for puzzles—ones that peak just before logic breaks. “So they say it’s closed up tight, huh? Show me how tight,” he grumbles to rookie partner Mika Oshima, who carries a rose charm and always listens too much to rumors.
This isn’t regular murder. The old man, Mr. Yaguchi, built half the tower district years ago. His room resembles a tiny antique shop crossed with an engineering lab. The glass is unbroken, only thick steel bars out on the balcony. Door’s locked, alarm’s untouched. So what’s the trick here? “Death is time … but who lost track?” Kenzo whispers. Mika giggles, but tension hides fear in her squeaky laugh.
The forensics team hands over results. No footprints or prints past Yaguchi’s. There’s only the smell of fried spices, oddly out of place—his dinner untouched in the kitchen. Suspicion falls on his grand-daughter Emi, known for wild parties, and on two close aides, but both claim: “I never set foot past the hall last night! Nobody gets past two doors there alone.” Which one’s lying? Would you suspect family if you found them there?
Nights draw out. Old Yaguchi’s journals surface: chock-full of odd math, and sketches of bizarre clockwork keys. Kenzo incites awe and eye roll with a trick: using his perfect recall he finds that a clock here keeps missing two minutes every night at 2:17 AM: “It can’t know it should work… unless someone made it so.” He runs a trial—locks himself and Mika in the suite overnight. As the hour passes, a strange sound pings from the top bookshelf. Mika catches something small—a rusted gear tied to silk thread—they both freeze. 
Soon, web of suspects tightens. Emi holds a hidden letter that slams her as prime culprit, but Kenzo isn’t sure: her tears aren’t fake, and her prints fail to match any near the body. The more he pokes around, pulling up real estate paper trails, the less fits in place for one suspect. Each door seems more open by someone unseen. Kenzo blurts over coffee, “The lie here is hidden by time. Not space.” Mika sighs. “That’s … poetic, boss, but not helpful.” He cracks a rare smirk: “That’s only ’cause you’ve never seen a clock kill a person.”
Diving bell-deep into Yaguchi’s security cams, Mika finds one shows a shadow, only after playing in reverse in near-darkness. Stripe-patterned, gone in 4 seconds. A worker? Wires are cut inside the elevator only for eleven minutes: not enough time. Every minute counts—literally.
As days tick by, Kenzo’s sleep’s fitful. He reads old autopsies and listens to quirky coroner Dr. Narukawa who notices the victim’s watch wasn’t stopped. In fact, the hands are jammed backward. Something bothers Kenzo about that, about the sound tied to a clock’s actual chime. “That’s not just a killing, that’s a message.” Then—doors slamming. Crash from the suite. They bolt—Kenzo draws keys, smashes in. Through broken glass and dust, there’s now a second body: Emi’s friend Tomoya, throat gashed, no weapon or clue, room locked once again from inside. Panic ripples through the whole staff. Who’s next?
Mika’s breath stutters. “Kenzo, someone is killing with the exact locked room trick, again!” He frowns, pulls his tie. “This is watching—you, me, all of us. It won’t stop until time runs out.” The first arc ends with Kenzo standing over blue police tape, scanning for patterns in air. There, amid dust motes lit by afternoon sun, Kenzo mutters, “You built a stage from steel and memory. But you bared your hand, clockmaker. You’re out of hours.” But has he actually found the trick? Or is he just echoing the script the killer wants? Curious to check next ep?
