From publisher blurb:
Your people came to Earth with an important mission. Sadly, nobody remembers what that mission was. Your minds and memories and mission data were all stored in the central computer while your bodies were kept in cryosleep for the journey, and the computer suffered a fatal error that corrupted all relevant mission data, including the minds and memories of the colonists. You have innate psychic powers including the ability to disguise yourself, and the ship came equipped with high tech equipment and plasma weaponry, and with only this to go on you and your people must decide what to do next. Will you study human biology, learning how their bodies work and how best to cripple or cure them? Will you study human society and psychology, and learn how best to manipulate them and hide among them? Or will you simply try to kill them all? The choice is yours.