Lucien Poly

In 19th-century France, a little girl follows her two sisters into a Carmelite monastery with the goal of becoming a saint.

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...