Hinako, a surf-obsessed college student, has recently relocated to a tiny coastal village. She is rescued by Minato, a handsome firefighter, after a fire breaks out in her apartment building, and the two fall in love shortly thereafter. As soon as they become connected, Minato is killed in a shipwreck. Hinako is so upset that she can no longer even look at the ocean, until one day she sings a song about their time together, and Minato emerges in the water. She is thereafter able to summon him to any body of water by singing their song, but can they truly live together forever? And what is the actual explanation behind Minato's abrupt reappearance?