At Theater tonight is a TV show broadcasted from 25th August 1966 to 21st September 1985. The show is broadcast plays recorded in two or three days, during public performances at the Théâtre Marigny on the Champs-Élysées, or sometimes Edouard VII theater.

For 7 years Don Dionisio has been engaged to Marguerite, a young girl from a good family. Every year he comes from the distant village where he is a civil servant to spend a day with his beloved. But that evening is the last time he moves in with Don Rosario, the innkeeper: the next day he marries Marguerite. But the arrival of a troupe of music hall artists who settle in the neighboring rooms and the meeting with the pretty Paula, will disturb his projects ...

Herve argues with his wife, after which he meets an appealing woman at a nightclub. A subsequent one-night stand with her turns into a tragedy when the woman is killed.