At about 42 minutes when one of the girls is waiting to be picked up by her friends she is wearing a mini skirt and black stockings. But then as she gets into the car they miraculously transform into black and white striped leggings.
The girls are locked in a cell wearing nothing but their underwear. Later Hannah is wearing a shirt (and has lost her bra) and May is wearing a skirt, with no indication of where these clothes came from.
The girls have a lot of tattoos given they are supposed to be virginal schoolgirls who come from strict, conservative families.
At the climax of the movie, all three remaining school girls confront the police officer, Jack, who's supposedly helping them in exchange for taking down the main villain, who one of the girls was holding, but all four of them leave the room without the villain in tow.