Mika, a prodigy ballerina, gave up her ballet career when she tore her Achilles tendon. Later, at the suggestion of Shoko, an acquaintance of her father's, Mika joins a swimming club where Shoko teaches synchronized swimming, but Mika is traumatized by an incident in her childhood and has a phobia of water. She is also bullied by Ryoko, the daughter of the owner and a top synchronized swimmer, and by her classmates out of jealousy. However, under Shoko's strict but enthusiastic guidance, Mika eventually overcomes her fear of water and her talent blossoms...