In the year 2200, an alien invasion is about to turn Earth into a colony. Fortunately, the invading civilization is only one technological level ahead of humanity. If people learn of the invasion in advance, they can unite and develop their technology to save Earth. Taking enormous risks, people board a time-travel ship and head more than a century into the past to warn humanity. But the ship malfunctions, and the journey through time does not go smoothly. This novel follows the three protagonists and their winding struggle to save Earth after the breakdown.
