A ten-year-old girl vanishes without trace from a Fenland village, her body never found. Thirty years on, she comes sharply back to life in the mind's eye of her childhood friend, Tina Humber, who has done her best to put the past behind her. But now, as Tina returns home for a family wedding, she replays her memories in search of what happened, fearing that deep down she has always known who killed Mandy Baker.