What will happenwhen a slow-paced
scholar meets an impetuous constable?

Scholar SUI TUNG LAU (CHAN HO, MOSES) becomes the new magistrate of Liangcai County. He is determined to fight against corruption in the magistrate's office. His cautious working style drives impetuous constable LUK SHAP YEE (CHOW LAI KI, NIKI) crazy. They form an argumentative couple.

Meanwhile, corrupt government secretary SZE KEI WONG (LAI YIU CHEUNG, WAYNE) has confronted LAU a few times before he completely admires his wit and courage. They become perfect partners at the judicial court and crack many mysterious cases together.

YEE's bravery and ambition win LAU's compliment. She is promoted to sergeant. Her mother, KAM YING (YIM, MICHELLE), worries that her innocence will bring her dangers, so she follows her around secretly when she is on beat. Once, she shows her special trick "Cloud Chopper" during an emergency, which creates the rumour that the "Chivalrous Flying Hawk" has returned to the martial arts world. This also draws attention to an old case concerning the loss of a treasured martial arts book called "Secret to Immortality".