Burn All My Letters is a captivating love story based on true events that shows how passion, jealousy and anger can create surges across decades and generations. The film follows the complex relationship of Karin Stolpe (Asta Kamma August), her husband Sven (Bill Skarsgård) and her affair with Olof Lagercrantz (Gustav Lindh) that begins in the 1930s but has repercussions for generations to come