 Jason Gideon s FBI profile team is called to an Arizona College campus where students and teachers fall victim to arson. However the pyromaniac profile doesn t quite apply: the culprit didn t make sure (s)he could enjoy the crimes by observing the victims perishing. Dr. Spencer Reid finds a better way to fit the facts with a rarer serial killer logic: a  religious  compulsion, in this case both triggered and given form by a boundless obsession with the number three- if this theory holds true a third, possibly triple, arson is at hand...