จดหมายลาฉบับที่สาม

A mismatched marriage binds Ruth Shaw and Ivan Green for three years, until Ruth is diagnosed with liver cancer and discovers Ivan's ninety-ninth affair. She demands a divorce with five promises and reinvents herself as the artist "Rina" to exact revenge. Later, she exposes the truth behind a car crash and a deadly scheme, unmasking Summer Ford's true colors. Ivan repents, but Ruth leaves a final, tearful farewell.