John knows the human body intimately. He’s had plenty of opportunity for study as a doctor, soldier, and lover. There’s one particular body, however, he knows very little about. When Sherlock launches himself head-first into a new obsession and they get sent on a case in an unlikely location, the pair discovers each other’s bodies with confusing yet delightful (and sometimes hilarious) results.

“This was like nothing John had ever thought to associate with Sherlock: stubble, skin-tight jeans and three small silver rings gleaming at the crest of one ear. It was unbelievable, like stepping into an alternative universe, and John couldn’t stop staring.”