It follows a group of criminal profilers who work for the FBI as members of its Behavioral Analysis Unit (BAU). They deal with many difficult and very disturbing cases, mostly—killings and kidnappings. Each one is different, but they all leave the same mark on the profilers. Currently, the team has been assigned a case in New Mexico—A very unusual case—two families killed. Father and son, then a mother, son, and father. The only survivor is the mother from the first family. Who says was at Church the night her family was killed.