Dumb or Deadly: The Heiress's Revenge!

Everything the Welling family owns runs through the Welling Group, and the Welling Group is run by Yvonne Welling. She is good at the job and engaged to be married, and from the outside nothing in her life is missing. A car accident changes that. The crash damages her brain, and for three months her mind does not work properly. When she comes back to herself she finds out what has been going on around her while she was in no state to notice. Her fiancé is her stepfather's illegitimate son. The two of them, with her best friend in on it, have been working a plan to strip her of the company and her money and to have her committed to a psychiatric hospital. She lets them go on believing the injury has not healed. She hires a bodyguard, and with him beside her she starts working out how to get the company back.