Heart of a Lion (Finnish: Leijonasydän) is a 2013 Finnish drama film directed by Dome Karukoski. It was screened in the Contemporary World Cinema section at the 2013 Toronto International Film Festival. The film tells the story about a Neo-Nazi named Teppo, who falls in love with a woman named Sari. He later finds out that Sari's son from the previous marriage is black. This leads Teppo to trouble with his fellow Neo-Nazis, especially his half-brother Harri.