Home to generations of humans, the starship Argonos has wandered aimlessly throughout the galaxy for hundreds of years, desperately searching for other signs of life. Now, a steady, unidentified transmission lures them toward a nearby planet, where the grisly remains of a former colony await the crew. Haunted by what they have seen, the crew has no choice but to follow when another signal beckons the Argonos into deep space-and into the dark heart of an alien mystery...