Sorry, Wrong Number (1948)
Leona Stevenson is confined to bed and uses her telephone to keep in contact with the outside world. One day she overhears a murder plot on the telephone and is desperate to find out who is the intended victim. husband wife relationship, telephone, family business , flashback, film noir, female protagonist, fear, chemist, heiress, invalid, criminal investigation, home alone, phone call, pharmaceuticals company
ETC.
