On a winter's day in 2002, a bottle shaped like a tear was washed up on the Kent coast. It contained a letter written in French, a lock of hair - and a mystery... Only one thing could be known for certain - that the writer of the letter was a mother, grieving for her lost child, Maurice. Moved by the woman's heartache, Karen Liebreich sets out on a journey to piece together the mother's story. She tells the compelling true story of one woman's search for another, and offers a poignant reflection on love, loss and motherhood.