The Black Butterfly (1916)

Sonia Smirnov, a Paris opera singer known as "The Black Butterfly", starts an affair with young Alan Hall. Hall, however, is still pining over his previous lover, a young peasant girl. Sonia--a former poor peasant girl herself--discovers a secret involving Hall and his former lover that neither knows about, but that involves an incident in Sonia's youth that could affect all of them.