On a torrential rainy night, Jiang Yousheng was framed and driven out of her home. In her helpless and desperate moment, she was fortunately saved by her father's old friend, Gu Simo, and has since been living as a dependent in the Gu family. Gu Simo is at the top of the imperial capital, with a cold and indifferent temperament, always keeping his distance from others; the outside world says his heart is as hard as a rock. Jiang Yousheng is well-behaved and sensible, keeping herself in check in all matters. Out of care, Gu Simo frequently gives her instructions regarding her daily life, outings, and social circle. As they spend time together day after day, that elder-like care quietly changes, and restrained feelings take root deep in his heart, making his concern increasingly deep and heavy. When she brings back a male friend, completely shattering his psychological defense, he—who has always been calm and restrained—drops his dignity, faces his feelings directly, and forces her to look them in the eye.