An elderly divorce Anthony 'Tony' Webster (Jim Broadbent) runs a camera shop in London and lives a mostly sedate life. One day, his ex-wife, Margaret (Harriet Walter) asks him to accompany their pregnant daughter, Susie (Michelle Dockery) to her prenatal birthing class. After dropping her home, he reads a letter he has received earlier that day. It is from the estate of the recently deceased Mrs. Sarah Ford, the mother of a former girlfriend whom he met in the 1960s while at university. He is left 500 pounds and two documents, the first is a letter somewhat explaining an unwarranted gift. The second document is still with Tony's former girlfriend and Sarah's daughter, Veronica Ford. Tony is confused why the mother of an ex-girlfriend whom he only met once decades ago would leave him something in her will..