As Ludwig van Beethoven lay dying in 1827, a young musician named Ferdinand Hiller came to pay his respects to the great composer. In the days after Beethoven's death, Hiller snipped a lock of his hair as a keepsake. This lock was passed down for more than a century through Hiller's family, until, during World War II, it found its way to the town of Gilleleje, in Nazi-occupied Denmark. There, it was given to a local doctor, Kay Fremming, involved in the effort to give aid to hundreds of frightened and hunted Jews. Who gave him the hair, and why? And what made Dr Fremming so reticent to speak about those terrible war years? After his death, Fremming's daughter inherited the lock, and eventually put it up for sale at Sotheby's, where two American Beethoven enthusiasts, Ira Brilliant and Che Guevara, purchased it in 1994. Subsequently, they and others have instituted DNA and other tests in the hope of revealing the probable causes of the composer's famously bad health, his deafness, and his final demise. This work looks at this inriguing journey through time.