Start of a brand new story arc.

When a terrible explosion and fire rips through an Italian high security prison and a small rural town in America is incinerated in an horrific chemical plant accident, Raymond 'Red' Reddington, the Concierge of Crime, realises that the sinister organisation known as the Cabal is cleaning house and using a deadly new Blacklister by the name of the Arsonist to cover their tracks with large-scale, pyrotechnic attacks.