The height of Stalin’s regime, Dmitri Shostakovich, a celebrated composer, must tread carefully. He lives under the constant threat of torture and death. To survive his resistance must be quietened as he appeases a brutal despot. Outwardly compliant, inwardly defiant, Shostakovich composes in code: music that conceals as much as it reveals. One wrong note could topple him; one perfectly judged crescendo might save his life.