Having grown up in London, Lucy is only just adapting to life with an estranged family in the Irish countryside when a mysterious object appears in the sky. The possibility of first contact sparks a new sense of motivation, leading her to explore the island on which she has been struggling to settle over the past few months. Lucy’s plans soon clash with her father’s overprotective reaction and her brother’s apparent disconnection to the appearance of the object, which has coincided with his own doubts as to whether this small, remote island is really the best home for either of them.