This is a hybrid documentary and drama combining real interviews and a fictional framing narrative, produced by Studio 4°C as a tie-in with their animated movie of the comic "Children of the Sea" by Igarashi Daisuke.

Animation production company Studio C, which worked on Children of the Sea, engage in their first live-action film. They have created a vision for a future civilization by combining a story pursuing the whereabouts of a missing man and interviews with actual scientists. Labelled with the titles "Marine Mammal", "Ocean", "Life", "Myth", "Dialogue", and "Universe", six tapes containing video recordings of interviews with renown experts have been left behind by a man (Morisaki Win) who has disappeared. The man's younger sister ascertains the man has gone to Micronesia.—jfdb