Wiktionary
babe in the woods
n. (context idiomatic English) A person who is innocent, naive, inexperienced, or helpless.
Usage examples of "babe in the woods".
Hell, Sally was just a babe in the woods, innocent really since her scams were basically easy pickings.
But I'm picturing Chip and his babe in the woods, camping out, and I'm wondering why Khalil, with new hiking duds, doesn't just go up to them and share a cup of coffee around the campfire, then casually mention that he's there to kill Chip and tell him why before he puts a forty caliber slug in his head.