Secret Moon

Suea and Mook had known each other since young age, they grew up together and had unsaid promise of undyingly loving each other but their separation was inevitable since Mook's father had to move abroad for his career. They eventually got together because Mook had to return to Thailand for a funeral, and it was then that they met after almost 10 years. Their happiness wasn't easily earned, there were many people wanting to take advantage of Suea's fortune, and had to get Mook out of the way.

100 years ago, the sisters Yod and Yard were the wives of Phra Wanathep. Yard was a loyal servant to madam Kamlai, his main wife. But Khun Thep asked Yod to help him get her sister and he would reward her. So Yod knocked her out and Wanathep raped her. Later, Yod tricks Yard into giving poison to Kamlai, to get rid of her and get Yard in trouble, so she can have Khun Thep all to herself. So Yard unintentionally kills Kamlai and her 2 daughters. All the servants find out that Yard killed Kamlai so they hung her. Yod's mother finds out that she caused Yard's death so she stabbed Yod and put a curse on her, if she was to cause her mother to cry a tear again, she will never be able to get reborn.