When the Snow Falls

A young couple, Mateo and Mia, decide to head north for a Christmas vacation. Destination? Montana. Things seem to be going well for the young couple at first, until the run into the Murray family.
One morning, Mateo wakens to find that his wife is not only missing, but has vanished overnight.
In a panic, Mateo rushes into town to try and find help, but the majority of the townspeople end up trying to convince Mateo that he's been there alone this whole time.
With just a few days before a snow storm comes rolling through the small town of Seeley Lake, will Mateo keep searching for Mia, or did she ever exist in the first place?