Estranged from her parents, a young girl named Ruka visits an aquarium on her summer vacation, and is drawn to two brothers, Umi and Sora, who were raised by dugongs. As Ruka begins to discover in herself a supernatural connection to the sea, a host of aquatic life mysteriously gathers off the coast. Adapted from the manga of the same name by Daisuke Igarashi, Children of the Sea lifts the artwork, story and dialogue directly from its pages, creating an atmospherically exquisite oceanic animation, leading to an incredible psychedelic finale.