A few weeks have passed after both Frontier Day and the Borg appearances. Many puzzles still remain unsolved, and Mariner is assigned to operate in Delta Quadrant to resume its scientific mission of exploring the unknown. However, while waiting for their new companion the USS Tokyo, the Mariner is requested back to Beta Quadrant to help out Task Force 86 in its fundamental mission, protecting the borders.

The newly colonized Mogotis near the Romulan and Klingon borders has suddenly become an unwanted location of attention. The House of Korath has made use of the chaotic situation within the Klingon Empire, and their sight is set on Mogotis as their prize. The Mogotis reaches out to the Federation for a call of aid in this situation, however it is in neutral zone and is to be treated delicate.

USS Mariner is sent to deal with the situation, but they will soon realize they are way over their heads…