Out of the Shadow (1919)

"To find a man's secrets ask the woman he loves- She knows!"

Ruth Minchin is unhappily married to her father's former business partner, a drunken brute. She contracts a friendship for Severino, a pianist, who lives in the same apartment house, and Minchin, discovering them together, orders the pianist from the room and knocks his wife down. Severino kills Minchin in a delirium following pneumonia, and Ruth is suspected of the crime.