11AM, 221B Baker Street.

Sherlock and John had been going about their daily business when Lestrade barged into the flat with his niece/nephew. He had been called away to an urgent case and needed someone to look after them until he returned. He had exhausted all of his usual options, so the detectives were a last resort.

Now, sitting in their common space, was a young person they barely knew. What could possibly go wrong?