Oscar, a carer with a literary bent, becomes involved by chance with Iris Bellwether, and, through her, with her brother, Eden, and their tight clique of Cambridge University students. As Oscar gets drawn ever more deeply into this bizarre and often disturbing society, we start to wonder if Eden is the genius he thinks he is or simply insane. We know from the prelude that there will be a tragedy, but even forewarned, the denouement is shocking.