The Decagon House Murders

2024•50m•8.7/10

Mystery

Ratings

🎬TMDb

8.7/10(11)

The drama tells the story of a group of seven university students who travel to a deserted island where a strange decagonal mansion stands. It was the scene of a grisly mass murder six months earlier, and events soon turn ominous.

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Production

Nippon Television Network Corporation, Tohan Kikaku, IMAGINE INC, Hulu Japan, Kodansha

Language

Status

Ended

First Aired

March 22, 2024

Last Aired

March 22, 2024

Networks

Hulu

Trailers & Videos

Where to Watch

Region US · Lang EN

No providers available for this region.

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Seasons & Episodes

Select a season to view episodes. Reddit links may contain spoilers.

Season

Episode 1

Air date: 2024-03-22

Konan Takaaki, a former member of K University’s Mystery Research Club, receives a mysterious letter from Nakamura Seiji. Determined to uncover the truth, he visits Seiji’s younger brother and meets Shimada Kiyoshi, who soon joins him in investigating the mystery.

Episode 2

Air date: 2024-03-22

During a training camp at the Decagon House on Tsunoshima Island, a member of the Mystery Research Club is murdered. As suspicion spreads among the isolated group, Konan and Shimada search for clues related to the earlier Aoyashiki incident.

Episode 3

Air date: 2024-03-22

Konan and Shimada continue their investigation but struggle to uncover any solid leads. While they question whether the mysterious letter might have been a prank, a terrifying incident unfolds at the Decagon House.

Episode 4

Air date: 2024-03-22

Reviewing the clues they have gathered, Konan and Shimada develop a new hypothesis that could explain the tragedy at Aoyashiki. Determined to uncover the truth, they decide to travel to Tsunoshima Island themselves.

Episode 5

Air date: 2024-03-22

As the situation at the Decagon House grows more serious, Konan learns the shocking details of the incident from the police. Devastated by the deaths of his friends, he considers stepping away from the case, but ultimately resolves to continue the investigation and reveal his final theory.