At seven o’clock one Tuesday evening, in a perfectly ordinary tower block near Westminster, four strangers meet for the first time. They each have three things in common: all suffered a traumatic experience six months earlier; all exhibit a dogged inability to put it behind them; and all accepted an invitation to attend tonight’s counselling session with the unconventional Genevieve, a determined woman with an unusual theory to test. But this isn’t a novel about psychotherapy or self-forgiveness. Because there is another reason these four people have been brought together. And when that perfectly ordinary tower block near Westminster turns out to be not quite so ordinary, all five are forced to make some unexpected and, for some, impossible decisions.