Fırat, nicknamed Kafkas, is a promising young boxer who has never lost a fight. When he steps into the ring for the gold belt match, he has no idea that his life is about to end. He defeats the world champion boxer, but his opponent cannot withstand Kafkas' punches and dies. Fırat's life changes dramatically as a result of this unfortunate event. Even though Fırat wins the gold belt that night, he loses his life, his career, and his pregnant wife. Seven years later, Fırat is forced to return to the ring to fight for Güneş, who has a terminal illness inherited from his mother. Now, Fırat has only one thing on his mind: to keep his son alive. Caucasus will return to the ring for Güneş and say, "One more round."