Namphueng Satan

Parit's father was cheated out of all his money by Nitchanan's father. As a result, his father shot himself, and his mother went crazy. He is bitter and seeks revenge by kidnapping Nitchanan, who just recently came back from Paris. He tortured her by raping her several times and verbally and physically abusing her. He even forces his sister to dump her boyfriend and try to get close to Nitchanan's brother to trick him out of his money. Parit also got close to Nitchanan's younger sister. Nitchanan loved her sister and didn't want her to meet the same fate, so she allowed Parit to do whatever to her in exchange for her sister's safety.
(Source: asianfuse.net)
~~ Adapted from the novel "Namphueng Satan" (น้ำผึ้งซาตาน) by Sopee Pannarai (โสภี พรรณราย).