A Selkie brother has one chance to come upon land with his sisters who are able to go as they please, they laugh together in the moonlight until they must return to the sea.. on way back he meets the daughter of a selkie woman who is being chased out of town, in an act of unfettered compassion he gives her his seal coat so that she may escape into the ocean in his place, he turns to sea foam as the coat becomes hers at sunrise