Liu Yan is an ordinary cleaning lady with an extraordinary identity that nobody knows about. Her daughter, Chen Wanqing, is the chairwoman of Tengfei Group and is preparing to collaborate with Professor Song, an authority in the field of artificial intelligence. To protect her daughter's career, Liu Yan keeps her identity secret and quietly continues working. At a high school anniversary banquet, Liu Yan faces ridicule from her former classmates and has no choice but to reveal the truth. When she announces that she will donate 200 million yuan to her alma mater, the entire room erupts in astonishment. Facing everyone's doubts, Liu Yan remains calm and confident, ready to prove her abilities through action. Just who is this cleaning lady really, and how will her true identity shock the world?