The movie is inspired by an Irish legend that tells about losing a half-human a half selkie (seal creature) mother. The mother leaves her husband and two kids suddenly. There are abundance questions on their head but no answer can reveal them. Saoirse tries to solve the mystery considering his silent younger sister as well as his big brother, Ben (David Rawle), with his circuitous path. What is actually happened to the lost mother? Will she be found by Saoirse? find the answer by watching the movie.