Lin Feng, a genius obstetrician, is suppressed by the powerful for standing by his medical ethics and is forced to work night shifts at a small hospital. Armed with a mysterious system that allows him to see the truth of life, he exposes a socialite's pregnancy fraud involving a foreign teacher, saves a patient from the brink of death during an amniotic fluid embolism, and uncovers a wealthy family's marital conspiracy with just three silver needles. With overwhelmingly superior medical skills and an uncompromising belief in instruments and data, Lin Feng turns the tables, humiliates his opponents, and rises to become the undisputed ace of Nanjiang's medical community.