SUMMARY: In the year 2130 a mysterious spaceship, Rama, arrived in the solar system. It was huge - big enough to contain a city and a sea - and empty, apparently abandoned. By the time Rama departed for its next unknown destination, many wonders had been uncovered, but few mysteries solved. Only one thing was clear: everything the enigmatic builders of Rama did, they did in threes.Now Rama II is on its way out of the solar system. Aboard it are three humans, two men and a woman, left behind when the expedition departed. Ahead of them lies the unknown, a voyage no human has ever experienced.