A heartbreaking letter. A girl locked away. A mystery to be solved. 1956. When Ivy Jenkins falls pregnant she is sent in disgrace to St Margaret's, a dark, brooding house for unmarried mothers. Her baby is adopted against her will. Ivy will never leave. Present day. Samantha Harper is a journalist desperate for a break. When she stumbles on a letter from the past, the contents shock and move her. The letter is from a young mother, begging to be rescued...