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Sex change Constance traveled back in time to the Victorian era and inherited the London Detective Agency from her adoptive father. But no one knows that there is a mysterious force called "Sichen Running Group System" that travels with her, which means that there is a mysterious power in this world that is difficult to understand with common sense. What does it mean to play heresy under God? What does it mean for an entire city's residents' 'existence' to burn? What does it mean that the family's legacy is actually the remains of Si Chen? What does it mean that the higher-ups have appointed you to be Si Chen? A few years later, she discovered that she had become Si Chen and controlled the existence of time.