A 1939 evacuation photograph reignites Caryl's search for her brother and forces her daughter, Megan, to reconcile her own past mistakes.

Caryl Hunter believes she lost her brother during the wartime evacuation of 1939. Her adoptive mother denies his existence and Caryl was too young to remember with certainty.

When she finds a black and white photograph of her family standing on a London station platform in the company of a mystery boy, her determination to find him reignites.

In 2020, Caryl's daughter, Megan, takes up the search for her missing uncle. Confronted by her own secret, will she ignore it or will she remember Caryl's lifelong torment, and avoid the mistakes of the past?'