From the announcement:
The Battlestar Galactica, humanity’s last beacon of hope, falters and crumbles. A tenuous solidarity between human and Cylon wavers under overwhelming desperation and doubt. For those seeking the promise of peace, a single vessel guards the future. The Demetrius, guided by unknown forces, plots a course through the stars…a course for home. Many would oppose this vision of the future. In this desperate time, both human and Cylon are driven to take matters into their own hands. For some, this means risking everything. For others, this means mutiny.