After a talent scout spots her performing with her dog Boi at a charity gala, Sharpay Evans (Tisdale) sets off for the bright lights of NYC, convinced instant fame and fortune are in the bag (designer, that is). But the theatre is a dog-eat-dog world, as she and Boi discover when they encounter the devious owner of a pampered Pooch named "Countess" and a scheming Broadway starlet who will do anything to crush the competition. Fortunately, Sharpay also meets Peyton (Austin Butler), a handsome student filmmaker who finds Sharpay nearly as fascinating as she finds herself.