Mia Scott, adopted daughter of medical tycoon Professor Jim, is secretly Dr. Z, a Harvard genius. Manipulated by her biological parents into marrying an elderly man, she accidentally weds ruthless billionaire CEO Oliver Wilson instead. They discover the mix-up but stay together for mutual benefit. Humiliated by her sister Lily Jones and Oliver’s ex-fiancée Nia Davis, Mia finally reveals her true identity. Oliver gives up his shares, and their bond blossoms into love.