Paen Rak Paen Rai

M.L. Napdara (Piyatida Woramusik), the only daughter of M.R. Napasrapee Siwawong (Nirut Sirijanya), secretly had a relationship with a low-born young man and became pregnant. Napasrapee sent her to Chiang Mai to escape scandal, but unfortunately, on the night Napdara gave birth, a fire broke out at the hospital, and her daughter went missing. Napdara fell ill with grief from that moment on.
18 years later, Napdara’s condition worsens. Pitying his daughter, Napasrapee instructs Prab (Tanongsak Suphakan), his close lawyer, to find an orphan girl to pose as Napdara's long-lost daughter. Napasrapee tells Prab that the baby had a family locket and a star-shaped diamond ring with her. He orders a new locket made for Prab to take to an orphanage in Chiang Mai.
Prab meets Gor-Yaa (Cheribelle Lallalin Tejasa Weckx), a young girl who actually possesses both the locket and the star-shaped ring. Mother Yupa (Sukanda Boonyathamik) reveals that Gor-Yaa was abandoned in front of the church 18 years ago with these two items. Prab tells Gor-Yaa the truth: she is the heir to the wealthy Siwawong family.
Gor-Yaa travels back to Bangkok with Mother Yupa and Prab. Payia (Mo Monchanok Saengchaipiangpen), an ambitious orphan friend, asks to hitch a ride. However, along the way, the car gets into an accident and overturns. Payia wakes up to see Prab and Mother Yupa dead, while Gor-Yaa is critically injured. Driven by greed, Payia hits Gor-Yaa with a piece of wood, believing she has killed her. She then takes the locket to present herself to Napdara, claiming to be her daughter.
Napdara is overjoyed, but M.R. Napajaree (Supaporn Khamnuansilp), Napasrapee’s sister, and Mae Chuen (Pitsamai Vilaisak), Napdara’s nanny, remain suspicious of Payia.
Meanwhile, Gor-Yaa is rescued by Id (Toomtam Yuthana Puengklarng), a hot-tempered young man who had once argued with her in Chiang Mai. When Gor-Yaa wakes up with amnesia, Id tricks her into believing she is his lover. He is aided by his close friends, Suban (Junior Kornwich Sungkitboon) and Doctor Wichan (Keng Wayo Assawarungruang). Id brings Gor-Yaa to live in his house to spite his father, At (Satawat Doonlayawijit), who has brought in his mistress, Sakuna (Panadda Wongphudee), whom Id despises.
At the same time, Chisanupong (Singto Thanat Ruang-ngam), the son of Chao Saeng Chot (Phuchong Yothapitak) and Chao Maluli (Pattra Thivanond), a wealthy Chiang Mai family, is searching for Gor-Yaa. Gor-Yaa was the one who cared for him when he was temporarily blinded by an accident, causing him to fall in love with her despite never seeing her face. After surgery restores his sight, Chisanupong sets out to find her with the help of Tang (Hathaipat Samatthawitthayawet), the mischievous niece of his close aide, Uncle Term (Prasart Thong-aram).
At the debut party for Payia Siwawong, the new heir of Siwalai Palace, Id (who is a neighbor) brings Gor-Yaa along. Chisanupong attends as a close relative. Payia nearly faints upon seeing Gor-Yaa. Similarly, Chisanupong recognizes the voices of both Gor-Yaa and Payia, but both women claim not to remember him. Suspicious, he tries to uncover the truth, but Id, mistrusting Chisanupong, keeps interfering.
Fearing Gor-Yaa will return to reclaim everything, Payia hires Nopadol (Kittipong Tantichinanont), her old flame, to get rid of Gor-Yaa. However, Napajaree catches Payia in her lie, realizing she is a fake heir. Payia then silences Napajaree and Mae Chuen.
Chisanupong eventually discovers that Gor-Yaa has amnesia and Payia is an imposter. Napasrapee offers Payia money to end the chaos, but Payia kidnaps Gor-Yaa instead, threatening Napasrapee to sign a will leaving everything to her. Napasrapee agrees, but out of paranoia, Nopadol kills him.
Payia then negotiates with Napdara. Napdara risks her life to save Gor-Yaa but is captured by Payia, who plans to kill both of them. Id and Chisanupong, realizing the danger, rush to the rescue.
Will the two young men save Gor-Yaa from Payia's clutches? And between Id and Chisanupong, who will win Gor-Yaa's heart?
Tune in and root for them in the drama "Paen Rak Paen Rai" (Love Plan, Evil Plan).