A rookie Homicide detective's negligence in a fellow officer's death has her searching for redemption in her investigations.

Christmas is a busy, busy time for the residents of Green River, particularly for Grace Long, the third generation of her family to steward the New England town’s signature Christmas Eve parade. This year’s audience for the parade promises to be in the millions, thanks to a national morning show that has chosen Green River as the site of its Christmas Eve day program.

Duncan MacLeod cannot die -- he is a 400-year-old immortal, who has seen his share of humanity's history. Still, he risks his life in battle against other immortals and tries to save people from harm.