Shen Nansheng, an overlooked secretary weighing 180 jin (90 kg), spends a passionate night with the cold-faced CEO Fu Yanci after drinking too much, then flees in a panic. Her pregnancy transforms her: she loses weight, becomes a stunning beauty, and returns to the workplace. Her scumbag ex-boyfriend refuses to leave her alone, while Fu Yanci secretly protects her all along. The CEO searches desperately for the woman from that night but cannot find her, unaware that she has been right beside him all along. When her hidden identity is finally revealed, the aloof CEO finally gets the happy ending he longs for.