When Gregor falls through a grate in the laundry room of his apartment building, he hurtles into the dark Underland, where spiders, rats, cockroaches coexist uneasily with humans. This world is on the brink of war, and Gregor's arrival is no accident. A prophecy foretells that Gregor has a role to play in the Underland's uncertain future. Gregor wants no part of it -- until he realizes it's the only way to solve the mystery of his father's disappearance. Reluctantly, Gregor embarks on a dangerous adventure that will change both him and the Underland forever.
Months have passed since Gregor first fell into the strange Underland beneath New York City, and he swears he will never go back. But he is destined to be a key player in another prophecy, this one about an ominous white rat called the Bane. The Underlanders know there is only one way to lure Gregor back to their world: by kidnapping his little sister, Boots.
Gregor's quest reunites him with his bat, Ares, and the rebellious princess, Luxa. They descend into the dangerous Waterway in search of the Bane, and Gregor knows what is at stake. If he does not fulfill the prophecy, his life, and the Underland, will never be the same.
With two prophecies fulfilled, Gregor is now focused on the Prophecy of Blood, which calls for Gregor and "the princess," Boots, to return to the Underland to help ward off a plague. His mom agrees to let them go -- on the condition that she travels with them.
When they arrive in the subterranean city, the plague is spreading -- and one of Gregor's family is stricken. Only then does he understand his role in the prophecy. He must summon all his power to end the biological warfare, or the warmblood creatures of the Underland will die.
For generations, rats have run the mice -- or "nibblers" -- out of whatever lands they've claimed, keeping them on the move. But now the mice are disappearing, and the young queen Luxa is determined to find out why.
When Gregor joins her on a fact-finding mission, the true fate of the mice is revealed. It is something far more sinister than Gregor or Luxa had imagined -- and it points the way to the final prophecy he has yet to fulfill. Will Gregor's role as warrior be put to the test?
Everyone in the Underland has been taking great pains to keep The Prophecy of Time from Gregor. Gregor suspected it says something awful but he never imagined just how awful: It calls for the warrior's death. Now, with an army of rats approaching and his mom and sister still in Regalia, Gregor the warrior must gather up his courage to help defend Regalia and get his family home safely. The entire existence of the Underland is in Gregor's hands, and time is running out. There is a code to be cracked, a mysterious new princess, Gregor's burgeoning dark side, and a war to end all wars.