Want to know everything about Detective Conan manga File 1135?

Looking for spoiler-packed analysis of Sunday Conan chapter 1135?

File 1135 continues the Police Academy flashback arc that began in File 1134, set seven years in the past.

A young Shinichi Kudo and Ran Mouri have teamed up with cadets Rei Furuya, Kenji Hagiwara, Jinpei Matsuda, Wataru Date, and Hiromitsu Morofushi to probe the eerie “Monster Mansion.”

What did the cadets decipher from the note Shinichi handed over, and what horrors really lurk inside the decrepit estate?

Our summary and theories below cover the events published in Weekly Shōnen Sunday issue 53 (27 Nov 2024).

Detective Conan File 1135 “Cutting the Gordian Knot” – Spoiler

The chapter opens back at the Mouri Detective Agency.

While Kogoro clamps a hand over the burst kitchen tap, Ran speed-dials the municipal waterworks for help.

Watching Conan head downstairs to check the mail, Ran flashes back to her childhood encounter with the Police Academy Team.

File 1135 Spoiler ① – The Cadets Split Up to Gather Evidence

In the flashback, Jinpei Matsuda picks a roadside mailbox and finds an electricity bill topping ¥30,000.

Convinced the residents are hiding something, Matsuda and Wataru Date decide to question them.

Meanwhile:

• Rei Furuya phones Instructor Onizuka to report “suspicious civilians,” skillfully massaging the facts to get the green light.
• Hiromitsu Morofushi slips into a drugstore to buy camphor mothballs and aluminum foil.
• Kenji Hagiwara borrows a police-academy service car, ordered by Onizuka to “give it a test run.”

File 1135 Spoiler ② – Face-to-Face With the Mansion’s Residents

Matsuda, Furuya, Date, young Shinichi Kudo, and Ran Mouri ring the mansion’s intercom; three men answer the door.

When Shinichi describes the fiery fish and shadowy snakes he saw the previous night, the trio dismiss it as childish fantasy—until Morofushi demonstrates a “swimming flame” by floating a camphor-and-foil disk across the pond.

Hagiwara adds a sizzling “black snake” firework created through a simple chemical reaction.

The three men protest there’s no proof they staged the phenomena.

File 1135 Spoiler ③ – Entering the Suspects’ Lair

The final piece is a photo that shows a demon mask inside the house.

Furuya promises to expose the trick if the men let them in.

Hagiwara suggests Ran and Shinichi wait in the car, but Shinichi insists, “I’m a detective—I’m coming.”

Hagiwara laughs:

Hagiwara「What a little tough guy」

and stays outside with Ran while the other four cadets head indoors to debunk the haunted snapshot.

File 1135 Spoiler ④ – Why Was the Electric Bill Sky-High?

Inside, Date and Matsuda confront the suspects about their ¥30,000 power bill.

The men open a room packed with humming PCs and claim to be day traders who leave their rigs running 24/7.

Date fires off one pointed question that exposes a slip-up in their story, proving the “day trader” line is a lie—and that the electricity was actually powering something far more illicit. He orders them to come clean about where that massive energy load really went.

To be continued in Detective Conan File 1136.

Detective Conan File 1135 “Cutting the Gordian Knot” – Review & Theories

This chapter serves as the investigation phase inside the suspicious “Monster Mansion.”

The Police Academy Team is razor-sharp from start to finish, cornering the shady residents with flawless teamwork.

Below are the key take-aways.

File 1135 Review & Theory ① – Unbeatable Five-Man Teamwork

The spotlight is squarely on the five cadets.

Each instantly grasps his role, dividing tasks with military precision while firing off cutting remarks that tighten the net around the three suspects.

It’s a textbook display of why this quintet remains fans’ favorite side team.

File 1135 Review & Theory ② – Kenji Hagiwara, the True Gentleman

Hagiwara once again proves he’s the team’s heart.

From calmly reassuring Shinichi and Ran to teasing Shinichi—“You’re all boy, aren’t you?”—and finally handing Ran a candy in the patrol car, every gesture underscores why he stole the show in The Bride of Halloween.

Expect him to land another memorable moment when this mini-arc wraps.

File 1135 Review & Theory ③ – Why the Electric Bill Is Sky-High

The chapter’s biggest riddle is the ¥30,000 power bill.

The likeliest answer ties back to the “mountain bayberry” note from File 1134: an indoor grow operation.

Maintaining 24-hour grow lights would easily rack up that kind of charge—far more than a roomful of PC monitors.

Look for File 1136 to connect the dots, using the code word “Yamamomo” as the smoking gun.

The article below provides an in-depth overview of Detective Conan Volume 107.