Lafleur and Papillon are two Parisian fans of the racetrack. One day in a neighborhood bistro, they learn that the horse they have bet on, "Canari," has won them 600 francs. While waiting for the bookie to arrive, they offer everyone in the bistro a round of drinks. The bookie does not show up, however, and the pair are forced to work at the bistro to pay their bills, Lafleur as the waiter and Papillon as the cook. One day the bookmaker is spotted in the restaurant, and Lafleur demands his 600 francs, which he then receives. At that moment, Ginette and Lulu, two milliners whom the men had met earlier, arrive. The four dine together, and then the boys invite them to the track the next day. Lafleur bets on a horse and wins big. Swelled with pride at their success, the two attend the sale of a champion horse, "Fleur de Nave." Lafleur has a tick due to his extreme joy at winning, and the auctioneer mistakes this for an eye wink, or a bid on the horse. After inadvertently buying the horse, the pair are left with only forty-five francs, and they try to sell Fleur de Nave but to no avail. After spending the night in the Bois de Boulogne with the horse, the pair meet Ginette and Lulu in a cafe, and the four proceed to run up a huge tab, which the boys run out on. Lafleur and Papillon then bring Fleur de Nave to the racetrack, where she is scheduled to run. As they have not hired a jockey, Papillon takes the job and wins the race. Now in possession of a fortune, Lafleur and Papillon marry Ginette and Lulu.