In the fast-paced bustling city, Lin Wei, a white-collar worker from a state-owned enterprise, longs for marriage, but falls into emotional confusion before the age of 30. At a party, she met Zhou Ran, a 23-year-old graduate who was full of ideals and passion. Out of good intentions, Lin Wei introduced Zhou Ran to a job, but she didn't want to start a sibling relationship full of sweetness and twists and turns. The two gradually got closer because of their common interests. Zhou Ran's passionate and straightforward pursuit broke Lin Wei's inner shackles and rekindled her heart. However, the real pressure brought by the age difference followed one after another. Questions from best friends, opposition from parents, and rumors in the workplace all impacted this relationship like a tide. When the filter of sweet love fades and they face considerations of responsibility and future, how should they find a balance between reality and love and protect this hard-won heartbeat?