Prince John, 18, gets a new personal guard. Sherlock, 18, is the best guard available. He is the perfect one to look after the King and Queens oldest son. __________ Okay so I just thought this was an AU that was needed and I couldn't find one on Wattpad so I wrote my own version. Please note that this is the first Johnlock fanfiction that I have ever written. Misspellings are to blame on me and my phone, but mostly on me.