Phssthpok is a protector stage Pak. Bereft of bloodline in a war on the Pak homeworld, Phssthpok migrate to the Pak Library in hoping of finding a reason that would allow him to stave off starvation.
Phssthpok discovers records of a Pak colony to the arm of the galaxy, and its probable failure. He works out that the soil of Earth lacks thallium oxide, and mounts a rescue mission aboard a ramship and spends the majority of the next 20,000 Earth years traveling to the target system of the colony (Sol System.) He arrives in 2125.