Antonia Ashton (McCrory) is a brazen hussy and a consummate schemer. She's married to boring business tycoon Hector (Cook) while carrying on with hunky professor Vic (Owen). She wants out of her marriage--by murder if necessary. Mousy Rose Bell (Ripley) wishes she could get rid of her drunken, philandering spouse as well. Antonia and Rose--old friends from the war--meet again in a gray 1946 London. Antonia has a plan--she'll see that Rose's husband has an "accident" and Rose will do the same with Hector. Antonia carries through but a grateful Rose is more cautious. Some unexpected twists in this variation of "Strangers on a Train." From the 1989 novel, "On the Edge," by Peter Lovesey.