Blind man in London pub overheard murder plot

A videotaped production of the Frederick Knott play in which three criminals play an elaborate scam on a blind woman who is in possession of a doll that, unbeknownst to her, is very incriminating. The play had already been famously adapted for the screen in 1967 starring Audrey Hepburn. This 1982 version was frequently shown on HBO in the 1980s.

After a flight back home, Sam Hendrix returns with a doll he innocently acquired along the way. As it turns out, the doll is actually stuffed with heroin, and a group of criminals led by the ruthless Roat has followed Hendrix back to his place to retrieve it. When Hendrix leaves for business, the crooks make their move -- and find his blind wife, Susy, alone in the apartment. Soon, a life-threatening game begins between Susy and the thugs.