On New Year's Eve, high school juniors Troy Bolton (Zac Efron) and Gabriella Montez (Vanessa Hudgens) meet at a party while both teens are at a ski lodge during winter break. At the party, the two are called upon to sing karaoke together ("Start of Something New"). They find that they have a connection and decide to exchange numbers before going their separate ways.
School's out for summer and the East High Wildcats are ready to make it the time of their lives after landing jobs in a wealthy country club owned by Sharpay and Ryan's family.
As seniors in high school, Troy and Gabriella struggle with the idea of being separated from one another as college approaches. Along with the rest of the Wildcats, they stage a spring musical to address their experiences, hopes and fears about their future.
Set at the real-life East High, where the original movie was filmed, High School Musical: The Musical: The Series follows a group of students as they countdown to opening night of their school's first-ever production of “High School Musical.” Show-mances blossom; friendships are tested, while new ones are made; rivalries flare; songs are sung; and lives are changed forever as these young people discover the transformative power that only high school theater can provide.