We've talked about them for millennia. The Sons of Heaven came to Earth and lay with the Daughters of Man, spawning the heroes of old (or the monsters of old, depending on your mythos). They have been called angels. They have been called demons, the fallen, the devil... Somewhere behind the myths, there were men, winged men who came from the stars and took simple human women as mate. It is time for one modern human woman to discover who and what the Sons of Heaven were, and that discovery will change her life forever.
When Jannie Reynolds goes down the line into the deeper caverns in search of more artifacts depicting the winged god-man, she doesn't know a team member with a thirst for fame intends to cut her ropes. She doesn't know her life will be saved by alien technology or that she will stumble upon a five-thousand-year old winged alien in a stasis tube who doesn’t know his colony has been destroyed. And she certainly doesn’t know she's an alien crossbreed, as well.