A strange man arrives in Belder on horseback, and introduces himself as Captain Zeppos. Initially, he is met with suspicion and jealousy, but he soon befriends a local, Ben Kurrel. It becomes apparent that Zeppos had a motive to come to Belder: when in Greece a stranger had made him an offer on a piece of land he had inherited near the town. Ben Kurrel and his friend Rita Mees help him investigate the mystery.
Steven Martens wants to establish himself as the village doctor. His cousin Boone, a cunning farmer, manages to persuade Steven to act as a "miracle doctor." This earns him an extensive clientele. Steven refuses to marry Marietje, the mayor's daughter. This prompts the angry village potentate to launch an investigation into Steven's qualifications. The young doctor is, of course, cleared of any wrongdoing, but the villagers feel betrayed and stop visiting him.
