When it gets dark each evening a virtuous young lady transforms into a notorious flirt but remembers none of it the next day. She is treated by a psychiatrist who tries his best to find the root of her problems and cure her once and for all
The authorities summon many young men for forced labor in the Suez Canal, so Metwally leaves his sister Shafiqa alone with their old grandfather, whereupon Shafiqa is forced to succumb to the temptations of Diab, the district chief's son. As their sinful relationship is revealed, she is forced to leave for Asyut, where she becomes the mistress of Al Tarabishi, the supplier of slaves.
