In order to save tiny Luxembourg from a cosmic catastrophe, a civil servant in a midlife crisis has to find back his lost superpowers and face his biggest fear: his family.

On Christmas Eve, the prostitute Mia meets four different people for different reasons.

The intrigue kicks off with a cop being murdered and develops as a complex and smart game of manipulation where nothing and no one are what they seem.

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.

The Polish woman Wanda, 35, looks after Joseph, 70, in his family villa by the lake. She is there for him around the clock and also helps his wife Elsa, 75. The youngest son Gregi, 28, ...

The future is a thing of the past.

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...