There's a flashing Santa on the loose, jingling his bells at unsuspecting holiday shoppers. Since Charlie is currently on her boss's naughty list, she must go undercover as an elf to try and track this wayward Santa down. This means that at the jolliest time of year, Charlie will be reunited with her greatest enemy: retail.
Meanwhile, she must also try to find presents that don't suck for all her friends and family. And speaking of family, there's one more thing that's adding to the stress of this Christmas: Harcourt, the high-ranking cop that Charlie is sure is corrupt, has reopened the investigation into her brother's disappearance.
There is not enough rum in all the Christmas cakes in the world to make this holiday merry.