Lara is a geologist, and is studying a volcano. On finishing a days work, she comes down, is driving home and realizes she forgot her backpack. She returns, gets it and on the way down, the ground gives way, and she finds herself in a deep hole, and a badly injured leg. No one knows where she is, but she is skilled, and considering how little she had with her, it couldn't have been that far. She agonizes over her predicament, reflects on past decisions in her life, but really makes no stupid decisions in trying to get out. Some may fault her on trying to climb out, but unless one is a free climber, one never thinks a foot or hand hold is enough to be safe. Days go by. Rescuers are searching, but they say it is a huge area. In the hole, she is visited by a snake, one of the worst fakes ever. It is neither a great movie nor a stinker.
