Based on the story "Prince Gabriel or the Last Days of Pirita Monastery" by Eduard Bornhöhe.
Livonia, 16th century. A young knight, Hans von Risbieter, inherits from his father a reliquary with the remains of St. Bridget, which a monastery wants to take possession of. Risbieter agrees to surrender the relic if he marries Agnes von Mönnikhusen, the abbess's angelic niece. However, Agnes's heart beats for Gabriel, a Robin Hood-like free man, who bravely stands up for freedom and justice. In the shadow of romantic adventures, the exploding anger of the Estonian freedom struggle is interwoven between the lines. In the form and shadow of historical scenery, the legendary adventure film has been able to speak to many generations.