Blackhearts is a documentary that tells the compelling story of three die hard fans of black metal. The hard rock subgenre gained worldwide notoriety because of its links to Satanism, church burnings and murders 25 years ago in Norway. We follow Sina from Iran, Hector from Colombia and Kaiadas from Greece on their journey to Norway - the Mecca of the music that has formed their lives. What makes someone risk their life, get thrown in jail or sell their soul to Satan to make this dream come true? Sina is the only active black metal artist in Iran, and face a potentially life-threatening situation if he choose to follow his dream and travel to Norway. Hector is a devoted Satanist and organizes a satanic ritual to sell his soul to the Devil in order to help his visa application. Kaiadas represents the extreme right-wing party Golden Dawn in the Greek Parliament by day, and is the frontman of the black metallers in Naer Mataron by night. He faces up to 20 years in prison after being arrested for association with a criminal organization.