This is the year 2000. Monsieur Gé, a mighty art dealer, has sold atomic bombs to all the nations of the planet and has become wealthy beyond belief. On the other hand, he is well aware that a general conflict will break some day. With this in prospect, Gé has built an "ark" a thousand meters below ground where he intends to save as many forms of life from destruction as possible. Representatives of each animal species will be put into hibernation there. As for the humans who will survive in this underground hideaway, there will be Monsieur Gé and his wife, Henri Jonas, an internationally renowned scientist, his wife and their twin children, Jif and Jim Jonas...