The great thing about a Fantasy Story is that any form of speculation takes it out of the impossible into the possible. So here we are witnessing the crash in the desert of an Alien spacecraft and the brush with death that Jim faces only to be saved by an Alien Mind which forms a symbiotic relationship to stay alive. A symbiote as old as the Universe itself.
Now bear in mind that a parasite is an unhealthy being, whereas a symbiote benefits both itself and its host. Of course Jim is forced into contact with Homeland Military, and the psychotic General.
JJ the beautiful sexy Army Doctor is forced into checking out our Hero, and they readily fall in love, as do her young daughters. The family is forced to run from the General and his Guard until fially defeating them.All this through mind control, and some highly charged incestuos love!