It's fall, and the New Yorkers are invading Quahog to watch the leaves turn color, driving everyone crazy. Lois, on the other hand, is being driven crazy by the lack of respect from her family, especially Peter. She takes up tae-jitsu in order to become more assertive, and it just so happens she's a pretty quick learner. Peter uses her new found talent in order to get rid of the New Yorkers, which only makes matters worse, and sends the family into an all out war...literally.