Malcolm Fox & his team are back investigating whether fellow cops covered up for Detective Paul Carter. Carter has been found guilty of misconduct but what should be a simple job is soon complicated by a brutal murder & a weapon that should not even exist. A trail of revelations leads Fox back to 1985 a year of desperate unrest when letter-bombs & poisonous spores were sent to government offices & kidnappings & murders were plotted. But while the body count rises the clock starts ticking & a dramatic turn of events sees Fox in mortal danger.