Fortress F-99 becomes the first D.I.C.E.members to cross the fabled Heron's Gate. Beyond, they discover a whole other universe full of unexplored worlds and new dangers. Even as F-99 establishes a foothold in this new dimension, they also discover this new universe to have its own guardians: a myaterious group of five highly-trained warriors named the Heron Knights along with their unique biomechanical companions, the Knightbreakers.