Tomm Moore directs this animated adventure based around Irish folklore. When a woman mysteriously disappears she leaves behind her husband Conor (voice of Brendan Gleeson), son Ben (David Rawle) and newborn daughter Saoirse (Lucy OConnell). Blaming her for the loss of their mother, Ben becomes resentful towards his little sister and doesnt treat her too kindly. But after it is discovered that Saoirse is actually a selkie the siblings must team up and go on a journey, along with their sheepdog Cú, to help a group of mythical creatures return to their home.