svengali is a horror film from 1931, directed by archie mayo and based on the gothic horror novel trilby by george du maurier.
an evil hypnotist transforms a woman into a great singer. she can only perform in a trance being a slave to svengali who fell madly in love with her.
how far would you go if the only way to be close to the one you love is to hypnotise them? how much would you give back to them in order not to appear as selfish?