The investigation reveals that the victim was poisoned with coffee. Conan eventually deduces the "locked-room" trick: the killer used a cassette tape string to slide the room key from a small window onto the victim's hand after the murder. Characters Involved : Conan Edogawa, Ran Mouri, and Kogoro Mouri. Police Force
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This episode is frequently cited by fans as a crucial "fluff" episode that brings the two detectives closer together, showcasing that their partnership is not just professional, but deeply personal. 3. Why Episode 487 is a Must-Watch
The voice acting elevates the emotional weight of the script:
| Category | Information | | :--- | :--- | | | Metropolitan Police Detective Love Story 8: The Left Hand's Ring Finger | | Japanese Title | 本庁の刑事恋物語8 左手の薬指 (Honchō no Keiji Koi Monogatari 8: Hidarite no Kusuriyubi) | | Episode Number | 487 | | Original Air Date | October 15, 2007 | | Broadcast Rating | 10.9% | | Duration | ~47 minutes (a 1-hour TV Special) | | Manga Source | Volume 56, Files 576-578 (Chapters 576-578) | | Opening/Ending | Opening 21 / Ending 28 | detective conan episode 487
: Wataru Takagi, Miwako Sato, Juzo Megure, Ninzaburo Shiratori, and Yumi Miyamoto. The Culprit
Conan’s deduction came in a quiet cascade. Miyake, who’d argued over telescope time, needed to complete a private experiment within a narrow window—one that Takahashi threatened to report as unsafe to the faculty. Miyake used his knowledge of gases and optical coatings to craft a compound that mimicked a harmless solvent when cold but vaporized into a deadly aerosol when warmed by equipment. He rigged a thermal trigger in the vents, set a delayed release, and manipulated the shutter schedule through a university terminal earlier that evening. The constellation chart? A coded message from Takahashi, marking the time the vents would be used; his last act had been to chart the exact cluster Miyake used as a mnemonic.
This sends shockwaves through the department, particularly among the legion of male officers led by Inspector Ninzaburo Shiratori, who harbor unrequited crushes on Sato. Officer Wataru Takagi, Sato’s actual romantic partner, is thrown into a state of sheer panic. He knows he did not give her the ring, leading him to fear that a rival has won her heart, or that Sato completely misunderstood the cultural significance of the placement. The Case: The Tragedy of the Mystery Writer
While the police department is distracted by the romantic scandal, a new murder case takes center stage. Kogoro Mouri is invited to an interview with Masataka Moroguchi, a renowned mystery book writer who has recently acquired a flashy diamond ring studded with dozens of small diamonds. The investigation reveals that the victim was poisoned
The forensic team discovers blood on the cassette tape string, solidifying the evidence against Dejima. 2. The Romance: Takagi & Sato’s Relationship Milestone
It is a high-ranking episode within the "Detective Love Story" subseries.
In the grand tapestry of Detective Conan , Episode 487 is a watershed moment. It is the episode where Sato finally stops running.
Detective Conan (Case Closed) stands as one of the longest-running and most successful anime franchises in television history. Among its vast catalog of over a thousand episodes, certain installments hold a special place in the hearts of fans for balancing complex murder mysteries with character-driven romance. Episode 487, titled is a prime example of this perfect blend. The Culprit Conan’s deduction came in a quiet cascade
The death initially appears to be a suicide, but Conan identifies it as a murder by analyzing the "locked room" trick:
Episode 487 Detective Conan Metropolitan Police Detective Love Story 8: The Left Hand's Ring Finger
But for those who have walked the 1,000+ episode journey, we know the series has a hidden, darker spine. Every so often, Gosho Aoyama stops playing fair. He stops giving us a puzzle and gives us a wound.
Conan's small fingers brushed the control console. The main computer had been wiped—remote access, someone with skill. But the auxiliary readout still held the last command: a timed shutter sequence set to close at 23:18. The victim’s watch read 23:22.
The episode kicks off not with a dead body, but with a rumor that sends shockwaves through the police precinct. Inspector Takagi notices a ring gleaming on the ring finger of Detective Sato’s left hand. In Japan, as in many cultures, this signifies engagement or a deeply serious relationship. Given Sato's status as the ultimate office idol—lusted after by virtually every male officer, including the fiercely protective Inspector Shiratori—the ring sparks a wave of panic, jealousy, and gossip.