A wounded criminal and his dying partner take refuge at a beachfront castle. The owners of the castle, a meek Englishman and his willful French wife, are initially the unwilling hosts to the criminals. Quickly, however, the relationships between the criminal, the wife, and the Englishman begin to shift in humorous and bizarre fashion.

In a cul-de-sac in the Faubourg-Saint-Antoine, Leon shares two rooms with his sister Marie. In one, he receives his clients: he is a tailor. In the other, Marie receives her own: she is a clairvoyant. Leon was happy until he learned what Marie was hiding from him. She is actually a prostitute, and Maxime, her supposed fiancé, is her pimp. On the same day, Leon also discovers love in the form of Arlette, a provincial young woman picked up by Marie.

A gang of five diverse oddball criminal types rent a two-room apartment in an old house on a London cul-de-sac from an octogenarian widow with three pet parrots. The group’s mastermind, Professor Marcus, tells her a cover story that they are members of an amateur string quintet and would like to use the rooms to hone their musical skills. In reality, they’re plotting to rob an armored bank van and plan to use Mrs. Wilberforce’s naiveté and her Victorian sensibilities to their advantage.

It’s Halloween night, and two “bad apples” decide to play some wicked tricks on the one house in a suburban cul-de-sac that is not celebrating Halloween. They terrorize a young couple in their home and these tricks become increasingly more sinister as the night progresses, finally ending in a Halloween the entire neighborhood will never forget.