The first rule of Sunday Lunch Club is … don't make any afternoon plans.
 
Every few Sundays, Anna and her extended family and friends get together for lunch. They talk, they laugh, they bicker, they eat too much. Sometimes the important stuff is left unsaid, other times it's said in the wrong way. 
 
Sitting between her ex-husband and her new lover, Anna is coming to terms with an unexpected pregnancy at the age of forty. Also at the table are her ageing grandmother, her promiscuous sister, her flamboyantly gay brother and a memory too terrible to contemplate.
 
Until, that is, a letter arrives from the person Anna scarred all those years ago. Can Anna reconcile her painful past with her uncertain future?