Italy, 1976. Gilderoy is a long way from home. His work as a sound designer for Dorking-based nature documentaries has not gone unnoticed. He has swapped the foley table of his garden shed for the glamour of the Berberian Sound Studio.
Inside the lockdown wing of Rikers Island prison, a frightened young man accused of murdering a cult leader is confronted with a charismatic born-again serial killer and a sadistic guard. Will one man's redemption lead to another's damnation?