Lem goes to Chicago to sell the wheat his family has grown on their farm in Minnesota. There he meets the waitress Kate. They fall in love and get married before going back to the farm. Kate is accepted by Lem's mother and kid sister but is rejected by his father, who believes she married for the money. (And the fact that Lem didn't get a fair price for the wheat is her fault too). The reapers arrive and quickly they make things even more complicated by making their move on Kate. Lem misunderstands the situation and believes Kate is actually interested. In despair Kate leaves the farm and Lem goes looking for her.
This adaptation of the Raymond Chandler novel 'Farewell, My Lovely', renamed for the American market to prevent filmgoers mistaking it for a musical (for which Powell was already famous) has private eye Philip Marlowe hired by Moose Malloy, a petty crook just out of prison after a seven year stretch, to look for his former girlfriend, Velma, who has not been seen for the last six years. The case is tougher than Marlowe expected as his initially promising enquiries lead to a complex web of deceit involving bribery, perjury and theft, and where no one's motivation is obvious, least of all Marlowe's.