Two strangers who share a sweepstakes ticket take it on the lam.

David Grant, an artist who draws caricatures in his shabby Greenwich Village studio, wishes book store owner Jean Newton good luck while passing her on the sidewalk. Soon after, Jean is given an expensive dress and decides that David has brought her good luck. She then urges him to buy a sweepstake ticket with her, and he agrees on the condition that if they win, she will take a trip with him before she marries her sweetheart, Freddie Harder. When David stipulates that the trip will be an artistic experiment and kept on a strictly impersonal basis, Freddie agrees to his terms, and Jean accepts to spite Freddie. The lucky partners' ticket is picked in the sweepstakes, and with their winnings they journey to Niagara Falls, followed by a suspicious Freddie. Expecting to catch the couple sleeping together, Freddie breaks down their bedroom door, only to find that David has checked out of the hotel and is driving back to Manhattan. Complications arise when David is stopped on the road and arrested for stealing Jean's car. Summoned to court, Jean and Freddie attempt to explain the situation, but their farfetched story fails to placate the judge. When in the course of their testimony, David admits that he is the famous painter Paul Knight Somerset, who had been jailed for drawing pornography, the trial takes on an air of notoriety. After David and Jean cross-examine each other, the judge fines Freddie for breaking down the door and apologizes to David for his unjust pornography sentence. With justice finally served, David renounces his Bohemian beliefs, and Jean and David declare their love for each other.