Margaret lives alone in a quiet suburban residence following the demise of her spouse, struggling with failing health while her adult offspring juggle demanding metropolitan careers. Believing they are providing top-tier medical assistance, the siblings hire Mona through a certified agency, unaware that the genial nurse is drowning in underground betting debts and targeting the family real estate.
Behind locked doors, Mona cuts communication lines and exerts physical terror on Margaret while feeding deceptive reassurances to the absent family. When odd bruises and strange bank notifications raise alarms, Margaret's children deploy concealed surveillance equipment, racing against time to intercept the criminal plot before their mother is pressured into signing away her ancestral home.
