Presenting a parody spin on the characters we know and love from the hit show Downton Abbey, this story is told through the eyes of the downstairs staff—especially one secretly badass valet John Gates, who turns out to be an undercover spy for Her Royal Majesty's British Secret Intelligence Agency (the SIS). Gates and several other Devonton staffers are part of a nationwide top-secret division of operatives scattered throughout country estates, all supervised by (who else?) the Dowager Countess, a close personal friend of Queen Victoria herself.

Armed with his own superpower—his limp disguises a steampunk titanium leg perfect for dispatching enemies of the crown—Gates's mission is to protect Devonton Abbey from foreign spies, assassination attempts, and traitorous household staff, all while posing as the valet to the utterly clueless Lord Samson. Action-packed antics ensue, romance blossons, and, as usual, the downstairs crew continues to run the show...and always saves the day.