Mrs. Oleson attempts to evict Kezia from her house by the lake. She, Willie and Nellie move in and force Kezia to serve as their maid, but Laura, Albert and Andy Garvey hatch a plan to drive the Olesons away. They get Kezia to concoct a story about a monster that inhabits the lake, and then dress up as the monster. The plan works, the Olesons run away screaming, and Kezia keeps her house.