Molly Kelly, a cigar stand drudge, marries the wealthy son of a restauranter who (as a result) disinherits his son. Later the son \"makes good\" by opening a lunch box stand and his father, whose business has fallen off, gives the young couple financial help to expand their business. An early effort from director Frank Capra (IT'S A WONDERFUL LIFE), THAT CERTAIN THING is a glimpse at the cinematic beginnings of this great filmmaker (and, therein, warrants some accommodating on the part of the viewer for the well-worn print).