Irene Langemann’s German documentary follows four piano prodigies through the vigorous training program of Russia’s Central Music School. Established in 1932 as a branch of the prestigious Moscow Conservatory, the school continues to groom virtuosos through a total-immersion curriculum overseen by exacting instructors who serve as surrogate parents. The students, of varying ages and backgrounds, talk about their aspirations and their grueling schedule (though they admit that they enjoy the perks of studying there), while their teachers, some of them alumni from the 1950s and ’60s, argue that those with talent have a responsibility to develop it. Langemann, herself a former music student from Siberia, acknowledges the downside of a cloistered childhood devoted to musical perfection—as a German agent points out, the bombast and relentless demands of the school often dim its students’ individuality—but for the most part her plodding 98-minute film plays like a recruitment reel.