Bicard nicknamed Le Bouif earns 1,000 francs for lending his body to the experiments conducted by Professor Caligari. Further adventures await him when he encounters Ladislas, a young reveler, who happens to be the crown prince of Corinthia. This one, who favors living it up over his royal duty, commissions Bicard to replace him on the throne.

The red night was set within the space of a few hours and in two locations - the rich madam Lesparre's old castle (where celebrations are underway to mark the marriage of her daughter Ginette to the handsome Robert) and the sinister mill 'Moulin-Maudit'. The young couple leave to their honeymoon driven by a mysterious chauffeur. Following a breakdown in open country they are forced to seek refuge in the mill, where untold horrors wait: blood oozing from the ceiling, a body wrapped in a tarpaulin, a menacing dumb figure and an old woman, etc.