Xue Hai, a wealthy businessman from Taiwan, went to Shanghai to study under the pseudonym of Dalang. When his classmates bullied him, his senior sister Bao Zhu came to help, and the two fell in love for the first time. An advertising company from Taiwan came to the campus to hold a "Sweetheart Queen" competition. Bao Zhu won the championship and was called "Sweetheart" from then on. At this time, Sweetie's father went bankrupt and abandoned his wife and daughter. Tianxin had to move back to Taiwan with her mother, but lost contact with Dalang due to misunderstanding. Abandoned, Darang became an emotional playboy until one day he heard "Sweetheart Time" on the radio. Xue Hai bought the radio station and retaliated against Sweetheart. When he saw Sweetheart dating someone else, Xue Hai discovered that he still loved Sweetheart deeply, so Dalang resumed his pursuit of Sweetheart. At this time, Sweetheart's mother discovered that Dalang's eldest sister turned out to be Sweetheart's father's first love, so she strongly objected. Their love is looking forward to getting out of trouble...