Meitantei Conan: Suihei Senjou no Strategy

On a luxurious cruise trip paid for by Sonoko, Conan and his gang enjoy the high life on the open seas. However, a shrewd plot for revenge was brewing right under Conan's nose. And this time Mori takes the spotlight, proving his own intuitions right, and beats Conan at his own deduction.

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Fifteen years ago, Daiichi Yachiyo Maru, a cargo ship, crashed into a large iceberg in northern Pacific Ocean, and sank, along with the captain and crew.
Now, in Nishitama, a ship designer of Yatsushiro Shipbuilder, which belonged to Yatsushiro Financial Combine, suffered from a sudden heart attack while he was driving, and died in a traffic accident.
Six months have passed since then. Conan, Ran, and Kogoro are enjoying their trip in the Aphrodite. The Aphrodite is a luxury liner, which is sailing for the Pacific Ocean as its maiden voyage. However, there is a suspicious person, and finally a murder occurs.
It's the beginning of a horrible plot occurring in the ocean, where there is no place to escape.

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Conan and the gang are taking a long needed vacation aboard a luxury liner – paid for by Sonoko! Their peace and tranquility is interrupted, however, by a string of murders onboard involving VIPs; and this time, it’s up to Mori to take the spotlight to solve the mystery. With the help of Conan, the case is closed; but as the suspects are caught, they decide to take the St. Aphrodite along with them. Now, Conan and the gang must escape the cruise ship before it sinks, but there may be more to the mystery than meets the eye...