Molly Hooper and her sister, Loo, have just moved to London after losing their father. Molly gets a new job teaching at the same school as a certain curly-haired Consulting Detective. What will Sherlock do when this beautiful brunette enters his world and turns it upside down? How will Molly react to meeting a man who is practically perfect for her in every way? And what will the pair get up to as their journey unfolds?