Hidden away in an Oxford backstreet is a crumbling Georgian mansion, unknown to any but the few who possess keys to its unassuming front gate. Its owner is the mercurial, charismatic Mark Winters, whose rackety trust-fund upbringing has left him as troubled and unpredictable as he is wildly promiscuous. Mark gathers around him an impressionable group of students: glamorous Emmanuella, who always has a new boyfriend in tow; Franny and Simon, best friends and occasional lovers; musician Jess, whose calm exterior hides passionate depths. And James, already damaged by Oxford and looking for a group to belong to. For a time they live in a charmed world of learning and parties and love affairs. But university is no grounding for adult life, and when, years later, tragedy strikes, they are entirely unprepared.