The Corin were an advanced alien race that disappeared leaving nothing behind except a series of enigmatic walls scattered across the galaxy. When archaeologist Jason Dodds makes a chance discovery while investigating a Wall on a remote planet, it leads him and a team of soldiers accompanying him, to a meeting with a hidden civilization and into the middle of a war that has been raging for hundreds of years. Pursued by enemies and against all odds, can they save the Earth and an alien civilization?