Lin Wan is a freelance illustrator with mild social anxiety who is used to recording her emotions through her art. Her paintings convey the warmth of emotions with remarkable precision. Shen Yanzhi, the aloof and elegant CEO of a tech company, suffers from severe insomnia. The only time he can sleep deeply is when he sits beside her. After running into each other repeatedly at a convenience store late at night, they get to know each other. Using the excuse of hiring an illustrator, he keeps her by his side, and their relationship grows from a contract into genuine affection. She's cool on the outside but warm within; he seems decisive, but is gentle underneath. Late-night hot drinks, working side by side in her studio, and voice calls when he can't sleep all hide a growing attraction. After facing a business rival who tries to use capital to erase the emotional value of her illustrations, an ex-boyfriend who tries to win her back with a mercenary kind of love, family pressures, and career crises, her art exhibition becomes a huge success, and his company shifts its focus to the mental health of city dwellers. In the end, they settle in a seaside cottage in Lincheng, using the warmth they give each other to ward off the city's chill. Though the evening breeze is cold, their lingering warmth can last through the years.
