 While on a field trip, Cartman discovers what looks like an ancient Indian arrowhead. He tosses it away as garbage but Kyle decides to keep it in his room. Soon after, a strange woman who keeps insisting she s an important star arrives in South Park demanding the stone. Little do they know the woman is actually Barbra Streisand, who is seeking the stone to unlock the terrible power it holds. Only the kids, with the help of Chef, Leonard Maltin, Sidney Poitier and Robert Smith, can stop her before it s too late.