When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium, and Umi and Sora, the two mysterious boys she meets there. They were raised by dugongs, and hear the same strange calls from the sea that she does.
Ruka's dad and the other adults who work at the aquarium are the only distinctly aware of what the children are experiencing, as they get caught up in the mystery of the worldwide disappearance of the ocean's fish.
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Children of the Sea>