In 1950s France, Hélène and Michel Dupuis lead a simple, predictable life. Hélène, a cheerful stay-at-home mom, and Michel, the proud head of the family, are content—until a freak accident with a new washing machine propels them into 2025. Now, Hélène is a powerful bank executive, while Michel struggles with unemployment and depression. As their children grow up in a world dominated by technology, their marriage and world are turned upside down. Can they adapt to this new reality and find happiness again, or will they ever return to the past?