He Wan, the daughter-in-law of the Hou Mansion, was wronged because her family was framed. She traveled into the 1970s with the remaining intelligence clues, and became an ordinary clerk in a state-owned factory incognito. She relied on the Machiavellian reasoning skills she had learned since childhood to unearth the remaining enemy agents who had been lurking for many years. She cleared the family's old grievances and maintained stability.
