Something lurks at the edge of known space. Strange sensor readings in the outer solar system force Anna Lenai and Jack Hunter to investigate a military installation. There, they discover a secret plan to develop the ultimate weapon. Meanwhile, Jena Morane struggles to expose the treachery of Grecken Slade. The secrets she uncovers could lead to war between Leyria and its aggressive, space-faring neighbours. Surrounded by enemies from all sides, can the Justice Keepers maintain peace in the galaxy?