Seventeen-year old Cindy is in awe of big sister, Donna’s sexual exploits, but she just doesn’t get it. Whether she’s spying on Donna, parked and “makin’ it” in the driveway with her boyfriend, or watching her bang dear ol’ stepdad, Cindy is curious but timid. But “don’t be afraid, Cindy” instructs the dreamy, ballady, canned-cheese 70s soundtrack, as Cindy inches her way toward womanhood.

17岁的Cindy对姐姐Donna的性行为感到敬畏，但她就是不明白。通过监视Donna，Cindy慢慢走向成熟。