It's almost Christmas, but all is not merry for Oak Pointe, Louisiana homicide detective Caleb Bourque. Someone is killing prostitutes who frequent a women's outreach center called Magdalen House. On each body the killer leaves a calling card—a sprig of mistletoe. After Joanna Chatelaine, one of the center's founders, is killed, her sister Jamie starts receiving phone calls and messages, threatening her life if she doesn't close Magdalen House. Can Caleb unravel this complicated case before the killer makes good on his threat to kill Jamie?