An ordinary girl, Lin Xiaonuan, suddenly encountered difficulties at home. Fortunately, the steady and reliable Mu Yuting came to help. Mu Yuting looks calm and taciturn, but is gentle and attentive at heart. He silently protects Lin Xiaonuan all the way, accompanies her to face life's problems, and calmly resolves interpersonal worries. From being unfamiliar and estranged when they first met, to getting along day and night with each other's warmth, the cold and introverted person gradually fell in love with him. He made a heart-warming promise and expressed his sincerity with actions. In the end, it turned into a pure love that goes both ways, creating a warm relationship that heals each other and grows together.