Xie A-Man, a cook who marries into the Prince's mansion as a substitute bride, initially intends only to rescue her younger sister, A-He, who is being held captive by the Cui Family Trading Company, and leave once the job is done. But on her wedding night, she first snatches a suspicious bowl of medicine from the prince, then encounters his three sons, each with a distinct personality. The eldest buys vegetables like a military commander leading troops, the second runs a street stall while obsessively keeping accounts, and the youngest puts on a tough front but is always thinking about her cooking. Using mealtime rules to bring the family together, A-Man also investigates the secrets hidden in the medicinal ingredients, spice boxes, and grain accounts. When the sisters uncover evidence that the Cui family framed the Prince's household, A-Man can finally leave with A-He. Yet the four father and sons are left standing in line, bowls in hand, waiting for her to serve the next meal.