After realizing that no one keeps their New Year’s resolutions, Frankie decides that they will be assigned anonymously to each family member, and an all-you-can-eat buffet feast will be the reward for those who can abide by their chosen resolution for a week. But chaos soon ensues when Frankie must spend more time with Brick, Mike needs to smile more, Axl has to keep his bedroom clean, Sue needs to stop trying out for things she’ll never make, and Brick must stop reading all of the time.
After celebrating New Year’s Eve, Marshall visits his father’s graveside to carry on their tradition of tailgating. Meanwhile, Barney and Ted open a bar called “Puzzles,” and Robin is forced to fill in for an inebriated news anchor.
A case of blackmail threatens to topple the monarchy itself, but soon Sherlock and John discover there is even more to it than that. They find themselves battling international terrorism, rogue CIA agents and a secret conspiracy involving the British government. But this case will cast a longer shadow on their lives than they could ever imagine, as the great detective begins a long duel of wits with an antagonist as cold and ruthless and brilliant as himself: Irene Adler.