A love triangle between a mother, her son and her daughter, La Belle Bete is a dark drama that explores themes of jealousy, vanity, emotional incest and ultimately murder.

The minds of Louise, a vain and rich woman, Patrice, her stunningly handsome yet mentally distant son and Isabelle-Marie, her dangerously jealous daughter, are explored, plunging us deep into a universe where the rules of the outside world do not exist and the governing emotions are those of loss and perversions of love. An overview of six years in the life of three individuals that care for each other, but have no idea how to act on this as normal human beings. A study of a family unit that dives so far off into madness, they necessitate radical means to be saved. And it's up to one member of the group to do so... No matter how cruel and murderous her methods may seem...