Young Enn and his best friends stumble upon a bizarre gathering of teenagers who are from another planet, visiting Earth to complete a mysterious rite of passage. That doesn't stop Enn from falling madly in love with Zan, a beautiful and rebellious alien who becomes fascinated with him. Together, they embark on a delirious adventure through the kinetic, punk rock world of 1970s London, inadvertently setting off a series of events that leads to the ultimate showdown between punks and aliens..