AU where the heirs of Durin survive BoFA. Kíli rules the Blue Mountains, now only a shadow of what it was before the Retake of Erebor, where Thorin is king and Fíli is crown prince, both of whom he misses dearly, but someone has to take charge of the settlement. Things are bad enough until they get worse - Kíli is summoned to Erebor to perform his duty as a spare and marry a foreign princess to tie deals of allegiance.