Wandering through the forest, a woodcutter finds a golden fern whose seed turns into a beautiful woman - they fall in love. After getting drunk in a village feast, he gets to sign up to the army. The fairy gives him a shirt to wear and asks him to swear he will never abandon it. At the war front, he falls in love with the the colonel's daughter and will have to perform various feats to get her attention.
A small town is one day visited by a priest who is there on a secret mission. He is a member of the Inquisition sent to investigate the activities of a local miller. The miller and his son are the descendants of an old family whose ancestral home burned down a century ago, but was rebuilt from scratch. The miller inherited much of his knowledge about the land, water, and a building's stability from generations of family experience. His reputation for finding water and predicting when a structure might collapse have come to the attention of the Inquisition -surely he must be in league with the Devil.
