The Marshal's Substitute Bride

Helena learns her teacher used her for her sister. She marries the young master. Teacher realizes he loves Helena, marries sister to uncle. Helena awakens the young master. Teacher crashes their wedding, young master defends Helena. Teacher tries to win Helena back, rejected. He conspires with her sister to kidnap Helena. Helena chooses the young master; her teacher commits suicide. Her sister tries to kill Helena, imprisoned. Helena and the young master live happily ever after.