在这部致命防御惊悚片中,一位单身母亲从一位英俊的教练那里报名参加自卫课程。 但是他对她产生了一种令人恐惧的痴迷，并策划了一系列越来越致命的“测试”，以确定她是否真正从他的课程中学到了东西。
A single mother signs up for self-defense classes from a handsome instructor. But he develops a frightening obsession with her and orchestrates an increasing deadly array of "tests" to see if she has truly learned from his lessons.
