Rami Malek haunts "Buster's Mal Heart" like an alien being just getting to know human form. In this finely calibrated indie from writer/director Sarah Adina Smith, the Emmy-winning "Mr. Robot" star is used to disconcertingly good effect, his large, lidded eyes like reservoirs of hope and pain. If Malek's role -- a mountain man nicknamed Buster who rants about an upcoming apocalyptic Inversion, but who was once a dedicated family man and hotel concierge named Jonah -- reminds you of his split-personality TV role, it's less a glomming-on than a burnishing of the actor's gift with conveying paralyzing rootlessness. In the Jonah scenes, Malek is a clean-cut, teetering Lynchian figure, dreaming of a better life for wife Marty (Kate Lyn Shiel) and their toddler daughter, but drawn to a mysterious conspiracy theorist figure (DJ Qualls) who feeds his nagging belief that his fate is mechanistic and predetermined.