Plot: World War II story alternates between the past and present, linked by a fateful song. Japanese sub I-77 battles an American destroyer off the coast of Okinawa. Before heading to war, the captain received a final present from his lover, the score to a song titled Manatsu no Orion. 64 years later, his granddaughter discovers the score and the significance behind the song.
Alternative Plot: During World War II, the commanders of a Japanese sub and an American destroyer try to outwit each other in a cat-and-mouse fight to the death.
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