A few months after the Skyfall incident, Q's sister gives him the excuse he needs to finally take a last-minute holiday at her cottage in Wales, but a priority two security threat means Q can't go alone.
For James Bond, the choice between a visit to Psych to discuss overwork or two weeks in the countryside is no choice at all — especially not with the lure of his enigmatic young Quartermaster as a companion.
Then again, 'enigmatic' doesn't even begin to cover the truth of who the Quartermaster really is.