An attractive widow finds her attentions turning to her teenage son in a troubling manner in this drama from France. Pierre (Louis Garrel) is a moody 17-year-old who is spending the summer with his parents at their summer home in the Canary Islands. While Pierre isn't especially close to his father (Philippe Duclos), he enjoys a warm relationship with his mother, Hélène (Isabelle Huppert) -- almost too warm, as her affection for him subtly strains the boundaries of typical familial behavior. When Pierre's father dies unexpectedly in an auto accident, his emotional dependence on Hélène grows, while her desire for her son does the same. Though Pierre finds himself attracted to several girls his own age summering on the island, he finds it increasingly difficult to reconcile his curiosity with the growing sexual tension between mother and son.