"Noblesse Oblige" is a French term meaning those who are privileged are obligated to help those that are less fortunate.  To Chun-fung (Kenneth Ma) is the illegitimate son of an affluent banking family during the Qing dynasty, but due to his birth title and his step-mothers he doesn't have much ambitions in life. Wanting to help the poor people in his county he decides to borrow money from his father and open a unique kind of bank. Instead of currency, his bank lends tools to people so that they can be employed. When nuns to-be Wai Lam (Tavia Yeung) and Wai Yu (Cilla Kung) borrows from Chun-fung's bank to renovate their monastery and is unable to pay him back they are forced to be his personal servants and body guards.  Prince Yu (Ram Chiang) takes notice of Chun-fung's clever idea and pushes him to be a government magistrate. Wanting to eradicate corrupted officials and with the help of Prince Yu, his older half-brother To Chun-ming (Joel Chan), who is the imperial governor of their province, and help of his best-friend Fong Gwai-cheung (Benjamin Yuen), Chun-fung becomes a magistrate. With Lam and Yu's protection against those who want to retaliate Chun-fung's cleansing of corruption he is able to take down many corrupted government officials but he is faced with having to choose doing right or family when one of the corrupted officials is Chun-ming