You should know that you hold my heart in your hands.

1960. Jennifer Stirling should be happy: she leads a carefree life alongside her wealthy husband. But her heart belongs to another, and he asks her to give everything up for him.

2003. Ellie Haworth has found her dream job: she is a journalist at one of London’s leading newspapers. She should be happy. But the man she loves belongs to someone else.

One day, Ellie comes across a decades-old letter in the archives: the unknown sender asks his beloved to leave her husband and go with him to New York. As Ellie reads these lines, she is shaken. What has become of the two of them and their love? She begins to investigate and discovers Jennifer: a woman who has lost everything. Everything, except for a handful of precious words. In the end, it is not only Jennifer's life that will change forever, but also her own.

Those who do not know love know nothing. Those who have it have everything.