The single line at the end doesn't fit with the other summary. The dragon bit is kind of pasted on, not giving any context or understanding as to how two completely separate stories come together.
FYI, you aren't blowing the plot by saying that the dragons and girls meet up. It is the writing rather than the intro that makes that moment satisfying, So consider....
"The small country of Truacia has truly never seen darker days. The royal family is gone, murdered fourteen long years ago,
(mis-stated. Aren't the twins royalty?)
and the cruel Chaedoran Empire has taken over. Still, the people rebel, branded as scofflaws and hunted down. Those captured are executed or sold into slavery and those that run free must remain wary not only of the Empire’s hunters, but also the wild dragons wreaking havoc upon the land. It is in the midst of this conflict that four young souls find their fates intertwined.
This is where you need a combining sentence for the dragons and the humans. Ex: Sibling dragons and two girls live separate lives until Maya is accused of stealing from the Empress herself. Her sister, Vierra,
delves into a world of secrets her enemies would much rather keep buried. (WHILE) dragon hatchlings Noi and Dea must learn to survive in a world completely unfamiliar to them. Threats lay around every bend and each step they take only brings them closer to the two-legged beasts that wish for their extinction."
I think the simple addition of a few words makes this much more cohesive.
A
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