Salvation and Doom

Six years after the Cathardi invaded Earth, claiming to be friends, Josh fulfilled his childhood dream of going into space. Now his friends were dead, and the Urlak had invaded Earth. The Cathardi refused to help Earth. He couldn't trust them. They betrayed his people, treating them like an early warning system against a known threat. Now he and fellow earthling, Kim, had fled from the Cathardi to the frontier to start a new life.
Liria believed the Creator led her to the out-of-the-way planet, Earth, where she would find the one prophesied to save Cathardi. Had the Creator spoken to her? Was she really a prophet? Liria had been so certain the Earth pilot Josh would fulfill the ancient prophecy. Now he blamed her and her people for the Urlak attack on his world. Did her attraction to him cloud her judgment? Now her dreams warn of doom for her world. Would it survive if the Urlak discovered its location? Would the true chosen one come? She has no choice but to heed the warnings.
Is Josh the chosen one? Is there any hope for either world?