Londoners Tom and Octavia Fleming seem to have the perfect power marriage: high profile and mutually supportive, both professionally and personally. They are attractive and rich, and each runs a successful business. They have three lovely children and a calendar brimming with glamorous social events. But when Octavia discovers Tom is having an affair, and that it is by no means his first, every single aspect of her marriage and her life threatens to disintegrate. And this is no ordinary affair--it is one that snowballs into terror that no one in the Flemings' charmed circle can escape.