After being tricked into having an abortion at Big Mama's underground abortion clinic / brothel, a young woman's extracted fetus is flushed into the sewer system wherein it's exposed to toxic waste and begins to mutate into an ever growing and increasingly bloodthirsty monster. The girls, johns and other assorted weirdos find themselves trapped inside the brothel where they are forced to face off against the agitated, prenatal creature, as well as each other, in a high stakes quest to stay alive, or at least in one piece. After being tricked into having an abortion at Big Mama's underground abortion clinic / brothel, a young woman's extracted fetus is flushed into the sewer system wherein it's exposed to toxic waste and begins to mutate into an ever growing and increasingly bloodthirsty monster. The girls, johns and other assorted weirdos find themselves trapped inside the brothel where they are forced to face off against the agitated, prenatal creature, as well as each other, in a high stakes quest to stay alive, or at least in one piece.