Cow and Chicken are feeling down, and visit their next door neighbor, who happens to be a famous blues musician. Through song, he tells them a wild tale.
While trying out the Pork Butt catapult, Chicken is accidentally swallowed by Cow. Mom and Dad take her to a doctor (the Red Guy), and they must get Chicken back out before he journeys through all four of Cow’s stomachs.
After Cow and Chicken tamper with the school photocopier, The Copy Fairy (the Red Guy) makes an evil version of Chicken through one of his copies. Evil Chicken soon runs rampant and it becomes up to Cow and Chicken to stop him and clear Chicken’s name.