The movie follows two castaway children who grow up with one of their fathers, but must fend for themselves after they are captured and deified by natives. Adapted from Henry De Vere Stacpoole's novel The Blue Lagoon, via the film of the same name, Pengantin Pantai Biru introduces several differences to the story.

Euis, a beautiful village flower girl, was forced to follow Mang Emon and his wife Jujuk, illegally to Muangthai. When they arrived there, Euis and the other girls were only used as entertainers. They were powerless to fight Mang Emon and his cruel thugs. Euis' desire to escape was still burning. She started saving as provisions. Euis then got acquainted with Ario, a Javanese young man who worked there. The two fell in love. Ario intended to help Euis get out of the valley of hell. At one point Euis' savings had been collected, but were stolen by Mang Emon's men. After Mang Emon's death, Jujuk intended to sell his brothel. The sale of the brothel became a fight among them. This commotion was an opportunity for Ario to arrange an escape. Finally they managed to escape, returned to Indonesia and then they set up a convection business.