An ordinary girl, Lin Nian, unexpectedly gained the special ability to see through clues. From the scratch-off notes left by her mother, she discovered the truth behind the death of her father, Zhou Zheng, an undercover policeman, and the clues he left behind in the criminal group's ledger. With her wisdom and ability, and with the assistance of the police, she uncovered a huge criminal network step by step, brought the masterminds behind the scenes to justice, cleared her father's name, and finally started a new life and inherited the mission of justice.