 When Jef s motorcycle breaks down, he frantically urges his cahoot Odilon to repair it by yesterday as his bossy wife Jeanne will otherwise grab her change to buy them a car, but to his despair there is a spare part left over. Meanwhile the students are divided whether to laugh off horoscopes (hence the title) but several sort of change their mind as it fits their purposes; especially Jo, a non-believer who stops at nothing to force a date, goes as far as to start writing horoscopes in the local newspaper instead of a sick friend when he hears a hot chick is nuts about astrology.