Retirement far from home doesn't set well for a man of action.
Life outside the Narvan is not as ideal as Vayen would like. His job is unfulfilling, the people aren't his, and even after five years, Anastassia still hasn't quite forgiven him for stranding them in obscurity.
Vayen's idle daydreams of returning to the Narvan turn into a nightmare with an assassination attempt. Old friends have become enemies and old enemies are even less happy to see him. Threats barrage him from all sides, endangering not only his own life, but those of his family.
There are too many hands vying for the Narvan, sinking the system into chaos. Vayen's well-intentioned plans have blown up and his homeworld, along with everyone else is suffering. Putting the Narvan together again means showing his face to the High Council, who will want to make an example of him for betraying their trust.
Staying out of it will get him killed. Unfortunately, his odds with jumping into it aren't much better.