"Somewhat sentient, the omega clouds obliterate life on every planet in their path. Now one of them is predicted to reach Earth in about 900 years. But between Earth and the cloud, lies the home world of the Korbikkan race. They are humanoid sentients and one of three sentient races known to humanity. Now, mankind must decide whether to marshall the science resources needed and to bring to bear the weaponry needed to save another race without putting itself at risk. Can a human rescue team save thier whole world without letting the inhabitants know they are being saved?"--SFsite.com.