Langkha Daeng

This is the story of Thongdee, a young man who has failed in both his personal life and career. He works as a security guard at the entrance of a large company building. Unexpectedly, he is fired when the company installs a computerized system to control the building—automatic doors and CCTV—eliminating the need for many security guards. Thongdee becomes one of those laid off.
He tries to apply for new jobs, but no one hires him. Each day he goes out job hunting, only to return to his rented room, living in loneliness. His only companion is Mali, a stray dog he talks to and confides in. He often reminisces about his past with Namfon, his ex-girlfriend who left him. Still, he holds onto hope that one day he will succeed and win her back. That hope keeps him going, despite society seeing him as a failure.
Eventually, unable to find work and falling behind on rent, Thongdee is evicted. Frustrated, he blames his downfall on being fired. He believes he was an excellent employee—someone everyone in the company knew, from janitors to executives, because he greeted them daily with a smile. He refuses to believe a computer could replace him.
Determined to seek justice, Thongdee returns to the company and tries to meet the president, but is arrested for his bold actions. At the same time, a wealthy woman named Chomsri, living abroad, reports her missing husband, Koytong. The last evidence she has is a letter and a photo—showing Koytong after plastic surgery, now looking exactly like Thongdee.
Due to this resemblance, Thongdee is mistaken for Koytong while in police custody. Despite his protests, no one believes him. The police assume Koytong has gone insane due to stress and paranoia. Thongdee is sent to “Red Roof Hospital,” a psychiatric institution founded by Koytong himself.
Unaware of where he is, Thongdee is treated like the hospital’s owner and given special privileges. Staff are excited by his presence, as the real Koytong has always been mysterious and never appeared publicly. Meanwhile, the new hospital director arrives, and a welcome party is held. During the event, chaos erupts when lower-class patients crash the party. At that moment, Thongdee realizes he is in a mental hospital and faints.
When he wakes, he insists he is not Koytong, but this only convinces others that his condition is severe. The new director introduces a policy to create equality among patients, reducing privileges for elite patients—except for “Koytong.”
Thongdee struggles to escape, forming a bond with a patient named Alai, the only person he can communicate with. Alai suffers from emotional trauma after being abandoned by her lover and later by her family. Thongdee promises to help her escape and reunite with her family.
He devises an escape plan, manipulating other patients into helping him. After several failed attempts, he finally escapes alone, leaving the others behind to face punishment. Feeling betrayed, the patients lose trust in him—except Alai, who still believes in him.
Outside, Thongdee becomes homeless, realizing society views him no differently from the “mad” people he once looked down on. He is eventually caught and returned to the hospital.
Over time, guilt changes him. Seeing how his actions harmed others, he decides to take responsibility. He pretends to be Koytong, believing he can use the identity to improve the hospital and help the patients. Chomsri, thinking her husband has recovered, takes him back to the mansion.
Living as Koytong, Thongdee improves the hospital, bringing life and hope back to the patients. He grows close to Alai and eventually brings her to live with him. However, this sparks tension with Chomsri, who begins to suspect something is wrong.
As secrets unravel—affairs, hidden wealth, and identity confusion—Thongdee finds himself trapped in a dangerous web of lies. When he tries to escape with Alai, he is betrayed and captured again. He is subjected to electroshock therapy, leaving him seemingly emotionless and memoryless.
Alai is devastated but eventually realizes he never intended to betray her. Meanwhile, Thongdee secretly regains awareness and pretends to remain insane, planning to outsmart Chomsri and expose the truth.
As Chomsri manipulates the system to declare Koytong legally insane and seize his fortune, tensions rise. The hospital prepares for its anniversary celebration, where she plans to publicly reveal “Koytong’s madness.”
The stage is set for a dramatic confrontation—truth, identity, and justice are about to collide.