Ada is a widowed writer, navigating loneliness in Oxford after the death of her husband. She has no children. No grandchildren. She fears she is becoming peripheral, another invisible woman.

 Eliza is a student at the university. She finds it difficult to form meaningful relationships after the estrangement of her mother and breakup with her girlfriend.

 After meeting through Ada's new venture, 'Rent-a-Gran', and bonding over Lapsang Souchong tea and Primo Levi, they begin to find what they're looking for in each other. But can they cast off their isolation for good?