Bạn Trai Cũ Là Sếp Của Tôi kể về Liao Yun Cheng and Tong Nian, childhood friends, fell in love during their university days but broke up due to misunderstandings between them. Years later, fate reunited them, only to find their worlds far apart. Tong Nian's company was acquired by Liao Yun Xheng's corporation, forcing them to become colleagues. Learning that Tong Nian had remained single all these years, Liao Yun Cheng decided to embark on a mission to win back his girlfriend. To avoid any misunderstandings, he created an online account to befriend Tong Nian and stood up to protect her whenever she faced crises or difficulties. Together, they navigated through workplace traps and sexual harassment issues and teamed up to defeat the antagonist. Ultimately, Liao Yun Cheng won back her heart, and the loving couple achieved a happy ending.
