Tempest and Sunshine (1916)

The names Tempest and Sunshine aptly point out the differences between two Southern sisters. After jilting her fiancé, Tempest decides to break the engagement between Sunshine and a wealthy planter and convinces her sister's former suitor to help her. Tempest's elaborate plan involves forging and stealing letters, but just when it seems about to work, the ex-suitor, made sick with guilt and remorse, confesses everything to Sunshine.