What is needed when an unknown group selects time periods to focus on correcting and it needs to do so without being overt? What is used to start a reaction (or chain reaction) which has compounding effects as the linear progression of time unfolds? The answer: Catalyst. What is a point where (and when) a single course of action or choice can change the outcome of future events? Where does the unknown group here, ply their very unique techniques for effecting its preferred outcome? Answer: Nexus With the given nexus found and ready to be entered, what will the catalyst that has been chosen be up to the task? Will the group be able to maintain their unknown status or will factions vying for dominance assume control of what the chosen catalyst has set in motion? Hold on for a ride with turns you will not see coming. The intrigue will keep you riveted.