Avery Miles is ready to spread her wings and prove her worth on a church mission trip to Iraq, but when their entourage gets blown off course in a desert dust storm, the group is lost in an inexplicable garden oasis. Along with the luscious fruits and crystal springs, Avery and her friends find poisonous snakes, deadly sink holes, and a group of natives that are almost unearthly—but that's not their biggest problem. No matter which way they trek, they can't seem to leave.