Jacob, a middle-aged architect living Copenhagen, is in the throes of a bitter divorce when he receives an unexpected call from his great-uncle Anton, who is in his nineties and still living with his brother on their rural Jutland farm—a place Jacob hasn’t visited since the summer of 1978. Forty years later, Anton remains haunted by a single question: What happened to Ellen? To find out, Jacob must return to the farm and confront the events that took place that summer, one defined by his teenage obsession with a beautiful young hippie from a local commune.