Her Masks (Sherlock x OC)

She was just a “normal” lady, they said, she knocked them out, they said. Her name was Elizabeth Amelia Louise “Pauline” Williams. She is from USA, called by Mycroft Holmes to go to London. He asked for her help to uncover a “special” case that he can only entrust to someone good, intelligent and reasonable. Though, while solving this mystery case, she encountered the infamous Sherlock Holmes, Mycroft’s brother. At first, she thought that he won’t notice her strange and suspicious actions but she was fully aware of his capabilities. Using her skills, she managed to fool everyone and even Sherlock. Mycroft and she are the only ones that know her true identity. Eventually, she kept up the act until she slowly unveils her case, bringing everything and everyone to realization to her identity. The problem is… someone is finding himself falling for her. Will everything work out in the end or will it collapsed like what happened in her backstory? Oops, spoiler alert.