The floating city exists.

Upon receiving the urgent missive, confirming the existence of the Flotilla, there's nothing left for Holly to do but rush to their aid. Hundreds, if not thousands, of lives are at stake. But the government, now run by her crew, are holding back their efforts. Betraying them could mean the start of a bitter feud, just when the dark city has a chance to regain its lost resources.

Alaria Bancroft is in the fight of her life - against her father and his trusted followers. After cutting the hydro-farms loose, they're in jeopardy of being lost at sea. To complicate matters, the biospheres are broken beyond repair, and food stores are rapidly dwindling. If help doesn't arrive soon, they all die. 

Ari's only option is to sneak back into the floating city in one last attempt to save as many as she can. When Holly arrives, the two have to work together, but it might be too late.