The now blended families must face each others prejudices and learn to coexist after returning to their home world for good. Forgiveness is far from being on the table and hostilities fester. When a new threat emerges from the expansion of galactic trade, they finally realize how petty their fights amongst themselves truly are.
But strife still exists as plots emerge to undermine their efforts. What is it that stops them from trusting one another? They must find the answer soon or their home world will meet its downfall.