The story of Clare and Henry, who have known each other since Clare was six and Henry was thirty-six, and were married when Clare was twenty-three and Henry thirty-one. Impossible but true, because Henry is one of the first people diagnosed with Chrono-Displacement Disorder: periodically his genetic clock resets and he finds himself misplaced in time, pulled to moments of emotional gravity in his life, past and future. His disappearances are spontaneous, his experiences unpredictable, alternately harrowing and amusing. The novel depicts the effects of time travel on Henry and Clare?s marriage as the story unfolds from both points of view. Clare and Henry attempt to live normal lives, but this is threatened by something they can neither prevent nor control, making their story intensely moving and entirely unforgettable.?