Unaccompanied

It is January 19th, 2150. Thirteen years since a plague wiped out 90% of the human race. All remaining survivors were shuttled up to space in the LWSS Avadora, in search of a new home. All survivors, except one.
Nitika Adams wasn't meant to get left behind. At seven years old, she realized she was the only person left on earth.
Until a strange ship crashes on her property, containing Cassian Nerezza, a convict from LWSS Avadora.