-Hubert and his two sisters Cathou and Alex share a large 6 1/2 in a quiet area of Quebec City's upper town (in Canada). He is an accounting assistant, Cathou is a hairdresser and Alex is trying to get an artist grant by practicing his art of sculpture. But as the trio struggled to cope and their love lives turned into emotional rodeos, terrible murders occurred in the neighbourhood. However, Cathou, a young woman with a fertile imagination, convinced herself that she had discovered the killer's identity and informed the police. She later discovers that they are most likely the murderer's next target.