The Mephisto Waltz plot
"...The Sound of Terror"
Myles Clarkson (Alan Alda) is a journalist and an emerging young classical pianist. He is therefore happy to combine these two loves for a long-awaited interview with the legendary - and ailing - concert pianist Duncan Ely (Curd Jürgens). However, Clarkson is in for a nasty surprise. The elderly Ely is in fact a practicing Satanist and performs a ritual whereby his soul transfers to the body of Myles at the moment of his death. Ely is now young again and can continue playing the piano. Problems arise, however, when Myles' wife Paula (Jacqueline Bisset) notices the changes in her husband's behavior. As she tries to uncover the truth of the strange happenings, she finds herself in Ely's horrific world and becomes embroiled in even more soul-changing devil's affairs, demonic possession and terrible family secrets.