Adapted from the novel of the same name, The Lady in the Cubicle describes the life of white-collar worker Tan Bin, who is approaching the dreaded thirtieth birthday. As she struggles with challenges in work and love, particularly when she becomes involved with her superior Cheng Ruimin, she uncovers the real meaning of true happiness. The drama will also revolve around the lives of two other career women: Mini, who is TanBin’s constant rival, and Jessica, a pampered young woman who has just entered the workforce.