An iconic film writer/director and his three on-screen protagonists each get points this time around for adapting. A high concept thriller based on a novel, M. Night Shyamalan’s Knock at the Cabin (B-) pits faith versus fear as a same-sex couple and their adopted daughter are visited by a quartet of strangers with a disturbing proposition. This unconventional home invasion story with plot holes aplenty is lifted by three performances including Dave Bautista as the peculiar leader of the trespassers, Ben Aldridge as the alpha dad lawyer and Kristen Cui as the wise pint-sized girl. Jonathan Groff is a weak link as the other dad; his character barely registers despite some pivotal final reel action. Shyamalan awkwardly handles some of the fight choreography and flashes to the world outside the wooded domicile, but the movie’s missteps are largely forgivable in the context of the fierce family tale. By borrowing from someone else’s story, the suspense auteur finds unexpected surprises.