The mysterious killer organization "Shadow Pavilion" in the world is ruthless and never misses a shot. Tieguanyin Yu Meiyu is the top killer in the Shadow Pavilion. She has sharp sword skills and extraordinary wit. She walks in the darkness all year round, performing assassination missions for the Shadow Pavilion and making money. However, because her hands are stained with blood, she feels deeply guilty and tormented in her heart. For many years, Yu Meiyu has been anonymous, performing tasks while silently guarding her family, hoping that one day she can quit and share the joy of family life with her family.
Finally, Yu Meiyu completed her last mission and decided to quit the Shadow Pavilion and live in seclusion in the mountains. However, she never expected that after she quit the Shadow Pavilion, her family was brutally assassinated and no one survived. Huge grief and anger swept Yu Meiyu, and she vowed to find the murderer and avenge her family. By chance, she met Fang Dooshan, the protector of the Tianshui Gang leader. The two were once rivals, but because of their common enemy, they decided to turn enemies into friends and work together to investigate the case. As the investigation deepened, they discovered that the death of Yu Meiyu's family was not the revenge of Yingge, but another hidden secret, which involved the power dispute between Yingge and Tianshui Gang, as well as a larger Jianghu conspiracy.
In the end, Yu Meiyu and Fang Doushan joined forces to reveal the true face of the Shadow Pavilion Master, defeated the murderer and his gang members, and avenged his family. Yu Meiyu also gave up her obsession with being a killer, chose to stay away from the darkness, and started her own life again.
