London, 1977. Enn (Alex Sharp) is a shy suburban teenager who sneaks out to after-hours punk parties. One night, Enn and his friends meet some teens who seem like they're from another planet; in fact, they are from another planet, visiting Earth to complete a mysterious rite of passage. Enn falls for beautiful alien Zan (Elle Fanning) - and into a delirious adventure that will test the limits of their love in this wildly entertaining film from director John Cameron Mitchell (Hedwig and the Angry Inch).