Farma continues to treat Empress Élisabeth II, which leads to an unexpected reward.

Things are looking up in the Saint Fleuve Empire, with Farma's initiatives improving the overall health of the populace. However, word arrives of a mysterious new illness that threatens to sweep the nation. Farma rushes to prepare for this frightening scenario.

Farma reaches the capital only to find that plague is spreading swiftly through the city. Can he and the people of the capital get the situation under control and defeat this epidemic?