There is a new student in Mr. Garrison's class: Timmy, a retarded boy who is in a wheelchair and can only mutter his name. The school figures this to be Attention Deficit Disorder (ADD), so he is prescribed Ritalin and is excused from doing his homework. The other kids catch on, and soon everybody is diagnosed with ADD and on Ritalin. Meanwhile Timmy happens upon a garage band rehearsing, and joins them as their new lead vocalist. They win a local contest, which gets them a gig opening for Phil Collins at a music festival. Collins is opposed to people paying to see Timmy, just to laugh at him, and the rest of Ritalin-addled South Park agrees. Chef takes control of this dire situation.