Ruth Malloy, whose father has become a human derelict because of Vivian Gregg, a theatrical star, loves Mitchell, a young playwright. Ruth learns that Vivian is enslaving Mitchell. Despite her efforts the girl is helpless to save him. Malloy drifts into town. He is filled with a determination to slay the human vampire and avenge his wrongs. Ruth comes upon her father just as he is in the act of aiming his pistol at the actress. Mitchell's eyes are opened. He sees in Malloy the fate which must be his unless he conquers his infatuation for Vivian Gregg. Ruth's love helps the boy. For the first time, Vivian Gregg, who has really grown to love Mitchell, realizes the depths of her infamy as she gazes upon the wreck that once was Malloy. Ruth, Mitchell and Malloy hear a shot. Rushing into the library they find Vivian Gregg dead.
—Moving Picture World synopsis