America 1968. Protests against the Vietnam War, for Civil Rights, sit-ins, love-ins, happenings - youth pitted against the establishment, hoping to create a better world. Everyone has one special summer. For British students Penny and Kate, and Americans Bobby and Sandy, it was that summer on Cape Cod. Warm languid days filled with love, laughter and music. Until the night Bobby's car crashed and burst into flames, and a bitter old woman took control, changing the survivors' lives for ever. One of the four was killed, another damaged; a third disappeared never to be seen by family or friends again. Penny survived, only to be haunted for almost twenty years by a dark and dangerous secret. Then a letter arrives asking Penny to return to America to help right the wrongs of that fateful night. But has she the courage?