Pouske runs the "Le Bienvenu" café with his wife Antoinette and daughter Jeanne. On the market square, the fairgrounds are setting up their rides and the neighborhood is getting ready to party. But Jeanne is about to fall in love with a sweetheart who has come from who knows where to cause trouble.

Two journalists drop by the Waterloo studios, where a director shows them a rough cut of a pacifist film. In it, a botched atomic test in Belgium creates a clay cloud that spreads world peace, causing stock markets to crash and weapons manufacturers to lose their jobs.The journalists roast the movie for being unrealistic, but the director defends it as a wake-up call to maintain peace. Afterward, they tour the studios, giving a cool look behind the scenes.