With Werewolves Within, the big takeaway isn’t that it’s funny, but that it’s based on a video game. By that standard, it shouldn’t be good at all. And yet it is. Heck, even by regular movie standards, it’s great.

In quaint, quiet Beaverfield, there’s a new federal forest ranger in town: Finn Wheeler (Sam Richardson, TV’s Veep). His arrival coincides with the discovery of a torn-up corpse that has residents on edge. It’s hardly the last body that’ll turn up — and specifically, at a local inn, where Finn and about a dozen others find themselves trapped due to a spell of bad weather — or, as bumblefuck Marcus (George Basil, Desperados) puts it, “streets is all storm-fucked.” Oh, and some of the guests believe a lycanthrope is to blame.

From Keystone-shaded pipeline drama to sabotaged generators, director Josh Ruben (Scare Me) and first-time screenwriter Mishna Wolff (ha!) give their cast a heckuva lot of obstacles to play against. In look and feel, Werewolves Within suggests an old-fashioned drawing-room mystery, but did Miss Marple ever have to face geysers of goo? Luckily, unlike too many of its horror brethren from the same litter, this film doesn’t forget to wrap a story around the gore or neglect to imbue its characters with personalities — not even the most hapless of victims.

Who survives or doesn’t is negligible when the cast is this well-stacked, making for a thoroughly winning ensemble with crack comic timing. Supporting Richardson are such reliable talents as Saturday Night Live vet Michaela Watkins, I Love You, Man’s Sarah Burns and, as Beaverfield’s mail carrier and Finn’s romantic interest, internet troll magnet Milana Vayntrub (aka Lily, “the girl from the AT&T commercials”). There are many more, each having a hand in making the movie to be the light, enjoyable and bloody romp it is — complete with The Free Design joyously buoying the conclusion. Oh, and maybe a lycanthrope. —Rod Lott