Barbara Hoffman (Birch) is a University of Wisconsin science student. She is a part-time employee at a local massage parlor. She is also a killer. Now all Detective Lulling (Carradine) has to do is prove it. 芭芭拉·霍夫曼是威斯康星州大学的学生，是兼职妓女，同时，她还是一个杀手。警探卢林的任务便是将其真实面目揭穿。