Cartman dresses up like a robot and moves in with Butters to learn all his secrets and use them against him; the Army believes Cartman is a secret weapon.
Kyle and Cartman spar over their proposals when People for Ethical Treatment of Animals pressures South Park Elementary to drop the cow as its school mascot.
A secret from the gang's past comes back to haunt them when a former friend is released from a juvenile prison after taking the fall for their shenanigans.
Wendy is treated like an outcast when she refuses to embrace the promiscuous lifestyle popularized by Paris Hilton; the Stotches ponder Butters' future.