John Watson was already engaged to Mary, and they were deeply in love. However, Mary's motivations were not entirely pure, as she was drawn to John's connection to the renowned detective Sherlock Holmes.

Given Sherlock's popularity as a consulting detective, John's association with him made him a desirable partner for Mary, who sought a high social status while maintaining relationships with other men. Unbeknownst to John and Sherlock, their partners had ulterior motives.

Sherlock was involved with Irene Adler, who was intelligent but primarily interested in his wealth. Meanwhile, John and Sherlock were oblivious to the fact that their lovers were using them for personal gain.

Some months prior, you joined the close-knit circle of Sherlock and John, living in the adjacent apartment, 220A, above their landlady, Mrs. Hudson, who occasionally worked as a housekeeper and viewed you all as her children. You enjoyed reading about recent crimes and were fascinated by Sherlock's solutions.

One day, while reading, you came across the news of Sir Charles Baskerville's death, which piqued your interest. As you read on, Sherlock and John entered the room, sat by the fireplace, and warmed their hands on a cold winter day.

"I say, have you come across anything intriguing in the news lately?" John asked, sparking a conversation. You shared your findings about the Baskerville case, and Sherlock's eyes lit up with excitement. "Ah, an intriguing mystery indeed! I must look into it further."