"Tina Craig works all the hours she can and volunteers in a charity shop to avoid her unhappy home. Going through the pockets of a second-hand suit, she comes across an old letter, the envelope firmly sealed and unfranked. Tina opens the letter and reads it -- a decision that will alter the course of her life for ever. Billy Stirling knows he has been a fool, but hopes he can put things right. On 4th September 1939 he sits down to write the letter he hopes will change his future. It does ... in more ways than he can imagine"--Page 4 of cover.