The Mystery Sinking in the Midsummer Pool

From Detective Conan Wiki
Episode 787-788
(Int. Episode 840-841)

TV Episode 787-788.jpg

Title: The Mystery Sinking in the Midsummer Pool
Japanese title: 真夏のプールに沈む謎
(Manatsu no Pūru ni Shizumu Nazo?)
Original airdate: August 1, 2015 (Part 1)
August 8, 2015 (Part 2)
Broadcast rating: 7.6%
Manga case: #261
Season: 25
Manga source: Volume 85: File 10 (903) ~ Volume 86: File 1 (905)
Cast: Conan Edogawa
Masumi Sera
Mary Sera
Ran Mouri
Sonoko Suzuki
Juzo Megure
Wataru Takagi
Kogoro Mouri
Case solved by: Conan Edogawa
Masumi Sera
Next Conan's Hint: Gas cylinder (Part 1)
Foam (Part 2)
Director: Yasuichiro Yamamoto
Organizer: Shigenori Kageyama
Storyboard: Shigenori Kageyama
Episode director: 787 Takanori Yano
788 Makiko Hayase
Animation director: Masatomo Sudo and Seiji Muta (supervisors)
787 Akio Kawamura
788 Akane Imada, Yui Ushinohama (asst.), Nozomi Sakamoto (asst.)
Character design: Masatomo Sudo
Kumiko Shishido (design works)
Production cooperation: 787 BIG BANG
Opening song: WE GO
Closing song: Kimi e no Uso
Prev episode: « Taiko Meijin's Match of Love
Next episode: The Queen's Weather Forecast »
List of episodes

The Mystery Sinking in the Midsummer Pool (真夏のプールに沈む謎 Manatsu no Pūru ni Shizumu Nazo?) is the 787th and 788th episode of the Detective Conan anime.




Part 1

Masumi Sera and the unknown child are in their hotel room, waiting for Conan to arrive. The child is questioning whether they can actually trust him even though she thinks he's clever, but Masumi assures her everything will be fine. She warns Masumi that if Conan is not worth their time, they will have to leave and find a new base of operations. After the warning, she hides in the bathroom as Masumi opens the door to welcome Conan in. Unexpectedly, Masumi sees him, Ran, and Sonoko standing outside, even though she told him to come alone. Ran and Sonoko came along with Conan because he told them she mentioned Hotel Hyde Pride had a pool. She tells the three of them to head to the pool first, and that she will come later. As a result, Conan's conversation with her and the child is unfortunately put on hold.

At the pool, Conan, Ran, Sonoko, and Masumi meet President Oiso's secretary Raito Samaki, a man Sonoko met with in a few parties. They also see the president's daughter, Nagami Oiso; Nagami's half-sister, Hamaka Oiso; and the hotel manager, Ensaku Toyoshima. These people are part of Oiso Finance, which is, according to Sonoko, a subsidiary of Suzuki Financial Group. President Oiso actually owns this hotel.

As Raito rubs oil on Nagami's back, Nagami loudly tells him, Hamaka, and Ensaku she knows their secrets. He and Hamaka are a couple, even though he is Nagami's fiance, and they are trying to take half of the president's fortune. Ensaku is secretly letting them use the hotel for their trysts. Before she storms off to tell her father about it, Hamaka tells her her necklace is missing. Thinking it fell while swimming, she angrily commands the manager to kick everyone out of the pool and orders Raito to bring her snorkeling equipment so that she can look for it by herself. After a while, she still could not find the necklace in the pool, so she takes the scuba tank Raito already prepared beforehand and tells him, Hamaka, and Ensaku, who were helping her search for the missing necklace, to get out of the pool. Conan, Ran, Sonoko, and Masumi, who already switched back from their swimsuits to their normal clothes, quietly watch them from a distance.

After lunch, the four of them were walking when Conan notices the hotel's bellboys looking excited about something. They learn from the three people who Nagami kicked out that she is missing. Suddenly they heard the bellboys say there is a person in the middle of the pool. Conan and Masumi rush to the pool to find out that person is Nagami, who already drowned.


EP787-788 Case.jpg

Location: Hotel
Victim: Nagami Oiso
Age: 31 years old
Cause of death: Drowning
Suspects: Raito Samaki, Hamaka Oiso, and Ensaku Toyoshima

However, when the bellboys looked in the pool ten minutes ago, nothing was there. As Raito carries Nagami's body and Ensaku carries the scuba tanks out of the pool, the hotel manager suddenly drops the tank back into the water after stepping on something. He looks into the water and tells everyone there are glass shards at the bottom of the pool.

After a while, Inspector Megure and Detective Takagi arrive to investigate the drowning. Based on the police reports, Nagami's time of death is between noon and 1 PM. According to the bellboys, they did not see anything in the pool until they searched the pool again and saw her body after 2 PM. When Conan and Ensaku told Inspector Megure about the glass shards, the police drained the pool immediately. Those glass shards were not in the pool when Raito, Hamaka, and Ensaku were helping Nagami search for her necklace. Conan and Masumi realize the glass shards form an aquarium. Later, the police find a fifty-meter-long fishing line stuck in the pool drain.

It turns out the secrets Nagami told everyone was just her misunderstanding. In fact, Raito, Hamaka, and Ensaku were planning to celebrate her birthday in this hotel, so they discussed decorations and food here secretly since they wanted it to be a surprise for her. After that was cleared up, Inspector Megure and Detective Takagi ask the three of them what they were doing when Nagami was searching for the necklace alone.

Part 2

Inspector Megure and Detective Takagi take everyone to the reception counter. The two women at the counter tell them the only people who entered the pool after it was closed were Conan, Masumi, Ran, Sonoko, Raito, Hamaka, Ensaku, and the bellboys. After Nagami said she would search for the necklace alone, the first person to return to the reception area was the hotel manager, at 12:05. During that time, she was looking for her necklace, and it took a while for her to notice Ensaku was standing behind her. When she saw him, she told him he was interfering, so he left the pool quickly.

The next person to return was Raito Samaki. He was going to tell her let someone else find the necklace for her, but she was not at the pool. Thinking she went to the bathroom, he waited at the pool for a while, but he eventually left since she did not return. Hamaka Oiso arrived at the pool when Raito left, and she left the pool at 12:54. She asked the women the time as she left because she had a reservation for lunch in this hotel at 1 PM. While at the pool, Raito asked her to check the bathroom and changing room, but Nagami was not in any of those places. When she learned Nagami was not at the pool, she panicked and asked the women at the reception counter the time because she did not trust the clock in her cell phone.

After that, the women at reception called the hotel manager, Raito, and the bellboys, who split up at the pool to look for Nagami. They searched for an hour but could not find her anywhere, so they went to ask the receptionists if Nagami left the pool; that was when they met up with Conan, Masumi, Ran, and Sonoko.

When Conan and Masumi asked the bellboys why they searched the pool a second time, the two men tell them they heard the strange sound of big bubbles. They charge toward the drained pool and see that the drain's grate is screwed in place. There is also a hook exactly at the center of the pool wall and located directly above the drain. After seeing the hook and drain, they figure out who the culprit is.


  • Resolution


    • The names of the suspects come from pool parks[1]:
      • Nagami Ōiso (大磯 永美) comes from Ōiso Long Beach (大磯ロングビーチ ["Naga" can also mean "long" in Japanese]);
      • Hamaka Ōiso (大磯 浜香) comes from Ōiso Long Beach (大磯ロングビーチ ["Hama" means "beach" in Japanese]);
      • Raito Samaki (左巻 頼斗) comes from Tokyo Summerland (東京サマーランド Tōkyō Samārando?);
      • Ensaku Toyoshima (豊島 延策) comes from Toshimaen (としまえん).


    In other languages

    Language Title Translation
    Flag of Catalonia Catalan (Catalan dub) El misteri de la piscina The swimming pool mystery
    Flag of Thailand Thai ปริศนาที่จมลงในสระในฤดูร้อน The Mystery Sinking in the Midsummer Pool
    Flag of Vietnam Vietnamese Bí ẩn chìm sâu dưới đáy hồ bơi giữa mùa hè The Mystery Sinking in the Midsummer Pool


    See also

    Episodes of Season 25