Directors Aaron Moorhead and Justin Benson’s 2017 film The Endless conveys its fairly complicated concept in a way that makes enough sense to feel believable, but it also withholds enough explanation to make that same concept feel incomprehensible on a cosmic scale. This partial sequel to 2012’s Resolution manages to do all of that with a very human-level story about the relationship between two brothers as they return to the cult that raised them after their mother’s death and gradually resolve their conflicting memories.