Summary: Sir John is back from the Crusades, wounded and exhausted and disillusioned with life. He hides out in his boyfriend Sheriff Lestrade’s manor, drifting through his days, moping about and generally making a nuisance of himself. So that he doesn’t cheerfully murder his boyfriend with spiky cudgels, Lestrade hooks him up with barmy young lord Sherlock, who wanders over the county solving crimes, making a nuisance of himself, and nearly getting burned at the stake by pissed off villagers who think he is a) a witch or b) just really annoying and superior.
John gets a new lease of life, Sherlock gets a bodyguard who thinks he’s brilliant, and Lestrade can get some peace and quiet to get his bloody job done, thank you very much.