In Manhattan, Frank Black and an anthropologist link a bizarre, ritualistic slaying to a lost tribe of Native Americans who follow apocalyptic prophecies.

As Christmas approaches... Frank experiences visions from his childhood when Jordan claims to have been visited by the spirit of her dead grandmother.

Catherine and Lara investigate when five girls claim they saw a vision of the Virgin Mary.

Frank and Emma investigate the suicide of a former FBI agent and discover links between the FBI, the Millennium Group, and the Los Alamos nuclear research center.