The title of the film, set in Luxembourg in 1942, during the Nazi occupation, amalgamates the words Schacko (helmet) and chapeau claque (opera hat). The village, in which it is set, has not yet been feeling the effects of the war at this point.

Four elderly men (Fons, Lull, Nuckes and Jängi) are fed up with being walked all over and treated like children. Together with their friends, they plan a future without old people's homes. But that's easier said than done.