Beginning at a Japanese love hotel and ending by a river in Tasmania, this is about the choice we make and the chain reaction that follows...in this case, by way of H. G. Wells and Rebecca West’s affair through 1930s nuclear physics to Flanagan's father working as a slave labourer near Hiroshima when the atom bomb is dropped, this daisy chain of events reaches fission when Flanagan as a young man finds himself trapped in a rapid on a wild river not knowing if he is to live or to die.