The Stronger Vow(1919)

During the Easter Carnival, Dolores de Cordova flirts with Juan Estudillo, not knowing that he is a member of the family with whom her ancestors have long feuded. Dolores' cousin, Pedro Toral, jealous of her attentions to Juan, kills her brother that night and after leaving Juan's handkerchief by the body, makes Dolores swear to avenge the death with her own hands....