Daraar (1996)

Rich industrialist Raj meets Priya in Shimla and falls madly in love with her, but she ignores him. Her mother tells her she should marry him as he is a good person, and she should tell him everything about her past. Priya writes a letter to Raj, which his servant Hari misplaces and replaces with another letter. Raj is shocked to find from Priya's mother that she was married before and is angry that she never told him. Hari finds Priya's letter in his coat and gives it to Raj. Priya has mentioned everything about her past in it that she was married to an abusive husband, Vikram, who made her life hell; she managed to run away from him and start a new life in Shimla. Raj forgives and accepts Priya after finding the truth. Vikram, who believed that Priya drowned herself, find out that she's alive and about to marry Raj, and manages to trace them to Shimla. He tries to kill Raj; on failing, he sends him to jail and goes to kill Priya.