One by One, ten people who work for a startup travel to a ski lodge for a company retreat. It's a secluded luxury chalet, which is soon made even more isolated due to a snowstorm in the area, which soon leads to an avalanche that leaves them stranded.
When the first fatality among the group happens, it's viewed as a tragic accident. But when the next occurs, it's clear that something much more sinister is going on. In this snowy mountain-top mystery-thriller, they know that the killer is one of them, but they'll need to figure out who it is, and soon, to avoid being picked off, one by one.