Karelia in the 11th century. A brutal feud between Kalervo and Untamo leads to the massacre of an entire village. The sole survivor is Kalervo's son, Kullervo, whom Untamo decides to raise as his own. As he grows, Kullervo's immense strength and rebellious nature make him feared by those around him. When he learns the truth about his past, his path becomes clear: revenge. His journey takes him across a harsh and treacherous land and into the hands of slave traders, only to uncover a devastating secret that will change his fate forever.