Song Siheng is a successful and ruthless entrepreneur in his late twenties who founded a tech company called Sicheng. Despite his professional dominance and cold exterior, he harbors a secret sexual preference for being dominated, a fact known only to his long-time assistant, Li Ke. On the night of the Cold Dew Festival, Song Siheng attends a social gathering hosted by a wealthy acquaintance, Young Master Lin, who attempts to introduce him to several college students. Song Siheng politely declines the offer and instead points to a waiter, Yang Xiaobei, as a joke to escape the situation. However, Yang Xiaobei takes the gesture literally and pursues Song Siheng into a hotel corridor, insisting that he was chosen. Despite Song Siheng's attempts to dismiss him, the encounter escalates into a sexual encounter in a hotel suite.
The following morning, Yang Xiaobei leaves without a word, leaving behind a blue note with his phone number and a crude drawing of a sheep. Song Siheng, initially annoyed, finds himself unable to forget the encounter. He attempts to locate Yang Xiaobei by returning to the club, only to discover that Yang is no longer working there. Their paths cross again by chance at a gas station, where Yang, wearing a teddy bear costume, confronts Song Siheng. Yang claims Song Siheng promised to support him financially, leading to a negotiation where Song Siheng agrees to pay Yang fifty thousand yuan in exchange for his companionship on weekends. The agreement requires Yang to undergo a medical checkup first.
As the arrangement begins, Song Siheng attempts to maintain strict boundaries, treating the relationship as a purely transactional one. He establishes rules prohibiting emotional attachment, prying into his personal life, and unauthorized contact. However, Yang Xiaobei proves to be persistent and intrusive, frequently sending messages and attempting to engage Song Siheng in conversation beyond their meetings. Song Siheng adds Yang to his phone blacklist to avoid harassment, but Yang finds other ways to contact him, including sending inappropriate photos during Song Siheng's business meetings. This causes significant disruption to Song Siheng's professional life, leading to tension and frustration.
Meanwhile, Song Siheng's personal life is strained by his family dynamics. He has a distant relationship with his father, Song Ping, and his stepmother, Fu Xuehua, both of whom are surgeons. His half-brother, Song Qin, is a quiet and studious academic who seems to share a similar reserved nature with Song Siheng but avoids social interactions. During a family dinner, Song Siheng learns that Song Qin has been on blind dates, which prompts Song Siheng to mock him, revealing underlying tensions between the brothers. Despite his efforts to keep his relationship with Yang Xiaobei secret, Song Siheng's behavior becomes increasingly erratic, affecting his focus at work and his interactions with Li Ke.
The story highlights the contrast between Song Siheng's controlled public persona and his chaotic private life. While he seeks dominance and control in his business and sexual relationships, Yang Xiaobei's unpredictability and persistence challenge Song Siheng's ability to maintain order. The narrative explores the complexities of their arrangement, as Song Siheng struggles with his desires and the consequences of his choices, while Yang Xiaobei navigates his own motivations and boundaries within the transactional relationship.
