Narrator Jeffy, now an adult, recounts his youthful adventures in the mid-1980s with humour and nostalgia. A typically awkward, insecure 12-year-old, Jeffy wants the same thing as millions of other young people his age: to be accepted and to find his place in the “nuclear catastrophe” phase of life called adolescence.
Twenty years before the events in the film's story, Jean-Pierre left his wife, Louise. At that moment, Marion and Sylvie, Jean-Pierre's two children, were respectively 10 and 8 years old. Eventually, Jean-Pierre will come back to his family and he believes that his past mistakes were forgotten.
