Ten years ago, a once-in-a-century fire occurred in London, England. The fire burned the originally magnificent Earl's house beyond recognition. The Earl Dean's family lived in the house at that time. Except for the eldest son who traveled abroad because of his longing for Japanese culture, the police only found the remains of the Deans and their servants in the house, while the three sisters who were supposed to be at home were mysteriously missing.
Three years later, newspapers in the UK and even around the world began to publish news about an organization called "Yuanyuan". There were rumors within the police community that this organization was closely related to the arson case that year. Is this true? What was the cause of the fire that year, where are the three missing sisters, and what is the truth...