As Sassamanash Farms hunkers down for the long winter, Monica agrees to let the local animal shelter host their Christmas-themed fundraiser there. The draw of the event—a chance to have your pet's picture taken with Santa—brings in animal lovers from far and wide. But when the crackling fire dies down and the festive holiday props are all carted away, Monica discovers a very un-jolly sight next to the barn—the dead body of one of the shelter's biggest donors. With the farm's good name in jeopardy, Monica goes to work to root out the killer.

By all accounts the victim was a charming and generous supporter of the shelter, but Monica discovers that he was loathed by those who knew him for being tight-fisted and unscrupulous. Suspecting money might be the motive, she turns her sights on his stylish wife and her lavish lifestyle, along with the manager of the struggling shelter, who stood to collect a hefty bequest from his will. But as Monica closes in on one final clue, the culprit closes in on her. Caught unawares, she'll have to survive the brutal winter weather, as well as a cold-blooded killer . . .