Troy Bolton and Isabella Montez come from two different worlds: Troy the Basketball God and Isabella the Smart, Stunning Geek. They meet on New Year's Eve and instantly click. When they meet again at East High School, they accidentally audition for the school musical. The social cliques they belong to don't approve of this new friendship and try to separate them. At the same time, drama queen Sharpay Evans and her brother Ryan, the co-captains of the Drama department, try in every way to prevent Troy and Isabella from beating them in the callbacks.