Set in the early 1990s, 13-year-old Karolína, a talented young singer, earns the opportunity to join a prestigious international girls’ choir, standing alongside her older sister and other competitors. It becomes clear that Karolína’s remarkable gift has drawn the interest of the strict and respected choirmaster. This gripping psychological drama evokes memories of the infamous Bambini di Praga case, as well as other harrowing tales of innocence confronted by oppressive authority.