In the present day, Seila, nineteen and pregnant, endures a painful and traumatic labor in a foreign hospital. The oppressive atmosphere is heightened by the presence of Nurse, Yichen, a man of foreign descent, and his emotionless mother, Fen. Seila gives birth to a baby boy, but her joy is short-lived as Fen swiftly takes the child away, leaving Seila distraught and trapped.
The narrative then jumps back fifteen months earlier to a vibrant Cambodian village, where Seila and Chantrea encounter Ming-Da, a woman offering them a seemingly simple job as maids. Despite Seila's reservations, they are persuaded by the promise of easy money and independence. They bid farewell to their families and embark on a journey to an unknown foreign country.
As they arrive in the foreign city, their initial optimism quickly fades. Seila and Chantrea are forcibly separated, each placed under the control of different individuals. Seila becomes a captive in the home of Yichen and Fen, enduring physical, emotional, and sexual abuse at their hands. Chantrea's fate remains unknown, her whereabouts a haunting mystery.
Seila's spirit remains unbroken, and she secretly reaches out to her mother, Nou, using a borrowed phone. Through tearful conversations, she pleads for help and reveals her dire circumstances. Nou, filled with desperation and determination, seeks assistance to locate and rescue her daughter.
Back in the present day, Seila's story takes a small glimmer of hope. With the collaboration of an organization called A21 and the Cambodian government, she manages to escape her captors. Seila testifies against her trafficker, resulting in a conviction and a 15-year prison sentence. However, the reunion with her baby remains elusive.
The search for Chantrea continues, leaving her fate unresolved. The film ends with a poignant reminder to the audience to remain vigilant and report any suspicions of human trafficking to the designated hotline.
"Promised" sheds light on the harrowing reality faced by countless victims of human trafficking, emphasizing the importance of awareness, advocacy, and the pursuit of justice. It portrays the resilience and strength of the human spirit in the face of unimaginable adversity and highlights the enduring bond between a mother and her child.