Abigail Crawley is the fraternal twin of Sybil Crawley. Abigail and Sybil both become nurses during World War 1. Tommy Shelby is a young man at the time of World War 1 who later becomes the leader of The Peaky Blinders Abigail and Tommy became close and fell in love during the war. Sending letters to each other weekly to keep in touch. But when the rest of the Crawley's and Shelby brothers find out, lives at Downton and Birmingham turn upside down.