Detective Conan: Strategy Above the Depths (名探偵コナン 水平線上の) is the 2005 Japanese animated mystery disaster film and the 9th Case Closed feature film, released on April 9, 2005. The film resulted in 2.15 billion yen, significantly less than the previous five films.[1][2]
Plot
The 9th annual Detective Conan film sets sail on a 100 million yen luxurious cruise. Fifteen years ago, a cruise named Yashiromaru, built by the Yashiro group, sank while sailing. In the present, a new cruise, the Saint Aphrodite, was built by the Yashiro group. Conan and the rest were invited to the cruise through Serena. Earlier, the husband of the CEO of the Yashiro family group, an established ship architect, had a heart-attack and drove his car down a cliff. On the second day of the cruise, the CEO herself was found murdered in her room. Later, her father, the President of the Yashiro group was also found missing. He had been thrown off the cruise into the ocean, seemingly by the same person. At the welcoming party, Richard shows off his deduction skills, and concluded that the sub-designer of the cruise, Akiyoshi, was the murderer. However, Conan has different ideas. Kusaka, a scriptwriter who worked in co-operation with Akiyoshi on a script, was the culprit.