Wang Guilan has been a housekeeper at the Lu family for thirty years. On ordinary days, she wears an apron to cook meals, and no person knows she was once an old subordinate who followed Elder Lu in founding the business. When young master Lu Ze first takes charge of the family business, he encounters quite a few difficulties. Wang Guilan takes out the account books and evidence she has treasured for many years, step by step guiding him to see through people's hearts and learn to be independent and strong. In the end, those with ulterior motives receive punishment according to the law, Lu Ze grows into an independent head of the family, and Wang Ma still wears her apron, stewing hot soup for the whole family in the kitchen.