As Christmas descends on Mistletoe, Maine, Holly White has an extra gift for the season: a new baby on the way. Her husband, Sheriff Evan Gray, has been worried about her elevated blood pressure, and Holly has agreed to take this year easy. Being idle has never been one of Holly's gifts, so when Evan surprises her with tickets to the town-wide dinner, she and her many cravings thank him. But when a thief tries and fails to steal an antique ornament from the dinner's holiday display, it's clear that someone is on the naughty list.

The thief manages to escape, but after dinner, Holly spots their lifeless body. It's clear that someone in town was keen to kill them. Evan is less than jolly to find his wife at the scene of yet another holiday homicide and asks her to promise that she'll leave the investigating to the police. But Holly has never been one to turn down a challenge and has to get creative with the help of a few of her friends in order to find this killer.

Will she and her friends be able to stop the killer and uncover the motive behind the attempted robbery, or will the killer strike again and paint the town a bloody red?