Tyrannis invites a suicidal Hydra to come live with him and his family. Everyone grows to love her, but Tyrannis comes to regret his decision when she accidentally embroils Krapopolis in chaos.

Tyrannis and Deliria go up north to find the dragon that is causing a plague; but when Deliria is infected with it, Ty must save his kingdom and his mom. Meanwhile, Hippo works on a cure to save the infected Krapopolis residents.

Hippocampus and Stupendous train an unruly group of town-children and accidentally create an apex predator. Tyrannis mistakenly attends an Anti-Tyrannis rally.

A plague of Muses descends upon Krapopolis. Deliria struggles to endure Shlub's centennial molting.