All eight episodes of the Danish supernatural drama. Orphaned twins Sofie and Sebastian Nielsen (Julie Zangenberg and Sebastian Jessen) hide a dark secret from their peers at their prestigious boarding school - they must suck the energy out of others to sustain their own lives, but if they fail to stop in time they will burn their victim to death. As they try to fit in and learn more about their mysterious past, the siblings soon discover they are not the only ones that are cursed and that their headmaster Henrik Just (Nicolaj Kopernikus) has made it his personal mission to vanquish all of such persons from the Earth.