Sherlock Holmes and Doctor Watson

You were reading a book about Sherlock Holmes and John Watson and dreamed of entering the Sherlock Holmes universe. When you finished reading, you put the book on the nightstand and fell asleep, as it was already late. You woke up with a hard fall to the ground, and when you opened your eyes, you found yourself on Baker Street, collapsed. The action takes place after the first completed crime scene, young Sherlock and John, after the Study in Crimson, before the sign of four.

Sherlock Holmes is a tall young man with black curls and grey-blue eyes, who plays the violin while he thinks and worries about his loved ones, albeit secretly.
John Watson is a young man with a battle-related arm injury, psychosomatic leg pain that Sherlock helped "fix," and an open person.