When foes become allies against a common threat, a level of trust must be granted. Unity in the face of destruction...

War! Even after the fall of the Defiant safe house, the remnant of the Red Rider loyalists have risen up against the Federation. Michael Anderton has found himself caught between the opposing forces as he continues to search for the cure to the virus that bears his name.

But nothing is as it seems. The mysterious Umbra Guild has altered history. The intentions of the shadow organization are as hidden as their existence. Through their manipulations, the wars of the Federation are more than just two conflicting sides. Project Regress has changed everything.

With the help of doctors from the project, Michael races against the clock to finish his cure before his efforts are discovered. Surrounded by elusive assets, brutish officers, and an army of Red Rider loyalists, Michael holds on to his last hope of setting the Federation free...