Temperature of Love follows the story of Lee Hyun-soo, an aspiring drama writer who uses the online handle 'Jane', and On Jung-sun, a chef who goes by 'Good Soup'. After meeting in person following a period of chatting online, the two develop a deep connection. However, their relationship is complicated by their differing perspectives on love and life, leading them to choose different paths as they pursue their respective careers. Five years later, the two reunite when they are both more mature and established in their fields. As they navigate the complexities of their professional lives and past heartbreaks, they must determine if they can finally align their 'temperatures' to make their relationship work. The series explores the nuances of timing, communication, and the emotional growth required to sustain a long-term connection.