Dong Poo Dee

Dong Phoo Dee (Blue Blood Territory) tells the story of Kom, a young girl raised by her mother, Khae, who suffers from amnesia. They are both under the care of Somporn, a school owner. On the day Somporn hosts a birthday party for her brother, Khae faints upon seeing Pit Rungplay. The encounter triggers her memory, and before she passes away, she entrusts Kom to his care. After the funeral, Pit brings Kom to Bangkok and leaves her with his friend, Rangsan Rattanadechakorn, requesting that she be raised and educated alongside Rangsan's own daughters, Ratiros and Potanee. However, Rangsan and his new wife, Bunga, despise Kom and treat her like a servant.
When Pit (whose real identity is Chawan Surabodin) travels abroad, he loses contact but asks his younger cousin, Chat Sayam, who is studying in England, to look after Kom if anything happens to him. Chat Sayam gives Kom a doll that deeply moves her, though the jealous Bunga eventually snatches it away. Meanwhile, Pailin (Rangsan’s older sister) and Lady Rattanadechakorn begin to suspect that Kom is actually the daughter of Khae Napha. Throughout her time in the household, Kom is constantly insulted by Rangsan regarding her parentage, yet she perseveres in her studies until she earns a scholarship, despite being bullied and looked down upon by the envious Potanee.
Tragedy strikes when Pit passes away, leaving a will for Kom. Upon returning to Thailand, Chat Sayam watches over Kom from a distance but keeps Pit’s death a secret. Bunga tries to flirt with him, but he remains indifferent as he is already engaged to Rungkan. As Kom grows up, Pailin and Lady Rattanadechakorn become more certain of her identity. They eventually open the documents Pit left behind, which reveal the entire truth. Overwhelmed with guilt, Rangsan realizes his mistakes toward his friend, his wife, and his own daughter, but Kom finds it impossible to forgive him regardless of his attempts to make amends.
After Kom leaves to study abroad, Chat Sayam marries the frail Rungkan, while Rangsan’s health begins to decline. In England, Kom becomes very close to a man named Piya. When Rangsan, now suffering from terminal cancer, wishes to see Kom one last time, Pailin writes to her to convince her to return. During this time, Piya’s frequent visits to Kom spark intense jealousy in Chat Sayam. Whether their seemingly forbidden love can find a way to end happily remains to be seen in the conclusion of Dong Phoo Dee.