After having worked for years as a shop assistant, the folksy Jeanne opens her own candy store. To finance the investment, she decides to rent some student rooms. Amongst the youngsters, there is always one nerdy over-achiever, who often gets into a conflict with the other students, or with Jef, the lazy husband of Jeanne. Jef works for the public greens department, although he constantly invents excuses to skip a working day. Family friend Odilon, with whom Jef shares a passion for billiards and fishing, proves to be rather dumb and extremely naive, leading everyone who asks for his help to eventually end up regretting it.