The clever Kajko and the mighty yet fearful Kokosz are two Slavic warriors who guard the safety of the stronghold of Mirmiłowo. The peace of the settlement is constantly disrupted by the Robber-Knights - a ruthless but incredibly unlucky military order led by the autocratic Hegemon. Every day in the stronghold is a battle against the invaders' new, devious intrigues, where the friends must rely on their own wits, the strength of the bandit Łamignat, and a touch of magic from Jaga the witch.