Mrs. Salad was a fan of the TV series. And being a good husband, I watched along, scoffing that anyone could be interested in a bunch of upper-class Brits and their servants.
Of course, I got sucked into it.
But a movie. Please. OK, I'll go, but I may nod off a few minutes in…
Well, I'll be darned. Sucked in again.
It's the same bunch, more or less. The primary plot driver is a surprise visit to D. A. by the King and Queen. Of England! A big deal. Which in turn sets off a lot of subplots. (I didn't count, but there had to be at least eight.) Most notably, ex-commoner (and Irishman) Tom is suspected of harboring anti-royal sympathies; could he be harboring thoughts of assassination?
Well, no. Of course not. But someone else is. And guess who's going to save the King? (Hint: not God, at least not directly.)
There's also Carson coming out of retirement to help the staff deal with the royal visit, pissing off his replacement Tom Barrow, who's struggling with his sexuality, which causes him to get into deep trouble, which gets resolved by one of the King's flunkies. Other of the King's flunkies attempt to take over from the Downton staff, and there's resentment and conflict there. Edith might be pregnant, and her husband's been tapped to escort the Prince of Wales (a real jerk here, just like in real life) to the Empire's African colonies. And…
Well, that's probably enough. If you liked the TV show, you'll like this.