Executive Producer Kristen Bell brings together former castmates of a high school musical, tasking them with re-creating their original performance in a high school reunion like no other. Emotions run high as the former students face faded friendships, former flames, self-doubt, and killer choreography. Through it all, these unlikely groups of friends—with the help of Broadway's best—just might pull off a standing-ovation-worthy performance of beloved musicals like "The Sound of Music," "Beauty and the Beast," "Annie" and more.