June Squibb, who did most of her own stunts in the film, plays Thelma Post, a feisty 93-year-old grandmother who gets conned by a phone scammer pretending to be her grandson (Fred Hechinger), and sets out on a treacherous quest across Los Angeles, accompanied by an ageing friend (Richard Roundtree) and his motorized scooter, to reclaim what was taken from her.  With Malcolm McDowell.