Rachel McAdams and Dylan O’Brien are employee and conceited millionaire boss who are forced to survive together after a plane crash leaves them stranded on an island. Sam Raimi embraces his horror/thriller roots with humor more clever than his past entries, and an exciting structure that pulls out another surprise every time you think the concept is about to wear out.

McAdams is always such a delight in any role she graces, but this may be one of her best performances — a woman whose lack of validation from others in her life turns into the ability to make horrific decisions. O’Brien is delightfully awful yet there’s a pity to the way he is unable to carry himself like a mature, generous human being. The CGI has a few distractingly bad moments, but that also contributes to the film’s silliness that it finds within the dark situations it finds, and then escalates. It’s a survival thriller that’s not a full on comedy, or a full on horror film, but has a bit of it all. The more the runtime goes by, the more intrigued you are to see what bloody chaos will play out between the two, with a true sense of unpredictability to it.