The Decagon House Murders

Name: The Decagon House Murders
Released: 2024-03-22
Rating: 8.727

2024 · 50m · TMDB 8.7/10 (11 votes)

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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About The Decagon House Murders

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.

Status: Ended
TMDB rating: 8.7/10 from 11 votes
Seasons: 1
Episodes: 5

Seasons and episodes

The latest season with aired episodes is shown first. Specials are kept separate.

Latest aired season

Season 1

View season page

S1 E1Mar 22, 202453 min

Episode 1

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.

S1 E2Mar 22, 202444 min

Episode 2

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.

S1 E3Mar 22, 202448 min

Episode 3

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.

S1 E4Mar 22, 202446 min

Episode 4

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.

S1 E5Mar 22, 202449 min

Episode 5

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.