During an outing at the mall, Homer gets his eyes examined while Marge and Lisa shop for items Bart will need for his camping trip. Seeing a film about tango dancers, Lisa is inspired to get dance lessons. Lisa, however, does not prove to be the most talented of dancers. Her role in an upcoming dance recital: curtain puller. Lisa is crushed. Meanwhile, Bart and Milhouse sneak out of their camping trip and decide to spend a week in the mall. Hiding out in an air vent until the mall closes the boys stuff themselves silly with candy, cookies and play with all the toys. The next morning Chief Wiggum is called in to investigate. Thinking he is on the trail of an enormous rat, Wiggum tries to catch them using various traps and tricks. Meanwhile, with a little help from Professor Frink, Lisa becomes the star of the recital.