Johann Sebastian Bach's majestic Cello Suites are among the world's best-loved pieces of music - but did another Bach write them? Australian musical sleuth Martin Jarvis explosively claims the suites were composed not by Bach, but by his much-loved second wife, Anna Magdalena. Jarvis's controversial quest for clues takes him from London to Paris to Berlin and beyond. Using advanced techniques of forensic document examination and drawing on his vast experience as a conductor and musician, he sets out to uncover the truth of the Cello Suites and rewrite some musical wrongs. Narrated by composer Sally Beamish.