Set in Ontario during the 1980s, Paula Jackson, a social worker, is approached by Lise and Suzette, two Québécoises asking for governmental help for their commune. In order to assess their living conditions, Paula visits the place. There she discovers that the commune is in fact a sect controlled by Québécois Roch Thériault, who is called Moïse by his disciples. Paula soon realizes that Roch is a sadistic manipulator, and decides to devote all her time to neutralize Thériault.