Lara Winslet is an expert geologist in volcanology. She is together with her team of work on a volcano to conduct surveys. At the end of a working day, Lara decides to stay a little longer to finish an exam and she remains so alone. Returning, she has an accident, falling inside a hole in the ground and remains blocked inside there, where no one can neither see nor hear her. Th... (展开全部)