A band of Basque immigrants treks through the Old West toward California, where they hope to put down roots and open wineries. When the group's leader dies, his widow Gabrielle marries his brother in accordance with Basque tradition. But it's a loveless union; Gabrielle is smitten with Lon Bennett, the scout who's been hired to guide them on their journey.
Loiseau the pharmacist mistakenly mixes potassium cyanide into a batch of cough syrup and sells five bottles. With horror he discovers his mistake and sets out to find the buyers. He finds only four. The fifth, not a regular customer, comes back to the pharmacy...