When teen Sarah is forced to babysit her half-brother Toby, she summons Jareth the Goblin King to take him away. When he is actually kidnapped, Sarah is given just thirteen hours to solve a labyrinth and rescue him.

Opening with the first day of rehearsals of the London production of "Sweeney Todd", this ninety-minute documentary focuses on the rehearsal process with the musical's director, composer and actors.