Exploring the vast, uncharted reaches of outer space may be challenging enough when we have our wits completely about us, but imagine how much more difficult it would be if we tried to do so without any recollection of where we were or how we got there. So it is for Riya (Eiza González), an astronaut who wakes up on a mysterious, ash-covered planet to find herself being the only survivor of her crew. As she moves about her ship, she finds everyone else has been killed, and she has no memory of how they got that way. In fact, she doesn’t appear to readily recognize anyone, either, and her react...