Tara and Sparrow are infected by a mermaid, and their faces become covered with green buds. Fabrice, Fafnir, and Robin arrive in Rosemond to help Cal find the cure for the girls. The mermaid attempts to capture a scientist, Dr. Flouch, to avenge the fact she was always treated like a monster. The poison would cause blemishes to appear on everyone's face, making her the prettiest in the land.
