The now-reformed Bad Guys are trying (very, very hard) to be good, but instead find themselves hijacked into a high-stakes, globe-trotting heist, masterminded by a new team of criminals they never saw coming: The Bad Girls.

Life seems easy for picture-perfect couple Ivy and Theo: successful careers, a loving marriage, great kids. But beneath the façade of their supposed ideal life, a storm is brewing – as Theo's career nosedives while Ivy's own ambitions take off, a tinderbox of fierce competition and hidden resentment ignites.

Follow the Crawley family and their staff as they enter the 1930s. As the beloved cast of characters navigates how to lead Downton Abbey into the future, they must embrace change and welcome a new chapter.?