This is basically ‘Murder, She Wrote’ does ‘And Then There Were None’, with a high body count to match, and is as much fun as that sounds. It sees writer turned sleuth Jessica Fletcher stuck in a local hotel during a blizzard, the other guests being a wedding party who are gradually getting bumped off. 
It’s silly but pacy and entertaining, even if the peril is never ramped up quite as much as it could have been and the mystery is less than perfect.