In a post-apocalyptic wasteland, an overprotective mother's world is turned upside down when a mysterious stranger arrives at her barricaded farmhouse, with deadly intentions on her naive daughter.

You’ve done a decent enough job of bringing up the key elements and characters. I do have issues with a couple of phrases though, which sort of bring the whole thing down for me. I think that talking about being “overprotective” and having one’s world “turned upside down” loses a bit of it’s meaning once the apocalypse has already happened.