From the publisher:
Affiliation Guide: Changelings
Take a deeper look at the hidden AMPs, those who escape from normal society and no longer consider themsevles human. Theirs is a life of philosphy and endurance, especially since many of them are pacifists. Of course, the arrest and trial of their leader, Conduit, has left a vaccuum, which many vie to fill. At the same time, their safehouses become more and more rare, but the Changelings are nothing if not survivors.
Detailed breakdown on Changeling hierarchy
Info on available safehouses
New Character: Triune
New Powers: Atavism and Secretions
Complete adventure: Heller Highwater