When Man reached for the stars, he ran into The Barrier. Whether natural or artificial, no one knew, but it surrounded the solar system and made interstellar travel impossible.
When a new drive technology allows a human science ship to 'tunnel' through space and reach past the Barrier, they find an alien force that destroys the ship without hesitation.
Now Commander John Marshall must lead the fight to defend Earth and humanity from the alien invaders. Now that we are free, they are intent on wiping us out.
Meanwhile, UMC Space Marine Tom Mitchell and his team must investigate a strange signal coming from a solar feature that has sparked Man's curiosity for ages - Haley's Comet.
If either of them fail, Earth may be doomed.