影片根据Marjorie Wallace撰写的同名书籍改编，讲述一对双胞胎姐妹非常沉默，她们只用一种专有的语言来彼此交流。她们迷恋于写小说、男孩以及青少年间的犯罪活动，她们之间的紧密关系使得某些事情变得十分危险。
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