To investigate her family's wrongful conviction, Yun Zhao assumes a false name and goes to the capital. Her exceptional medical skills earn her merit during a plague and attract the attention of Xiao Yu. The two form an alliance over an unsolved case and sign a “cooperation contract.” He gives her access to the investigation, and she helps him unravel the political intrigues at court. As they work together, feelings quietly take root. But Yun Zhao discovers that her father's case seems to be deeply connected to the old case Xiao Yu is investigating.
