Ye Zhaoning, a modern criminal psychology professor, traveled through time and became the daughter of a useless master in Dawei County. She decided not to "crush" the ancients with the arrogance of time travellers, but to use a knowledge "criminal psychological profiling" that the ancients had never heard of. In an era when criminal investigation technology was zero, she used pure logic and psychological games to force murderers who thought they were perfect into desperation.
