Can the secrets in Margaret’s past explain the mystery in her present? Meet Margaret Small: 75, plain spoken, Whitstable native and a Cilla Black super fan. Shortly after the death of her idol, Margaret begins receiving sums of money in the post, signed simply 'C'. She is convinced it must be Cilla, but how can it be? To solve the mystery of her benefactor, Margaret must go back in her memories almost 70 years, to the time when she was 'vanished' to a long-stay institution for children with learning disabilities.