Artemis's mother has contracted a deadly disease -- and the only cure lies in the brain fluid of African lemurs. Unfortunately, Artemis himself was responsible for making the lemurs extinct five years ago. Now he must enlist the aid of his fairy friends to travel back in time and save them. Not only that, but he must face his deadliest foe yet ... his younger self.

Seventeen-year-old Laz Hayerian wakes up on an abandoned Earth to discover that he and his companion Ivy Downey are clones, and they must work together--combining their talents to sense and step into and out of timestreams--to save humanity from imminent extinction.

After an especially rough tackle on the football field, Ash thinks he might be suffering some permanent damage, because suddenly stop signs are blue and always have been. After the second universe-altering hit, he drives a Beemer instead of a Dodge, and a pair of interdimensional twins promises him answers. The more universes he visits, the more Ash has to face perspectives he never thought to consider before, and the closer the universe gets to complete...

At boarding school in Ireland, Artemis receives an urgent video e-mail from his father. In it is a plea from his father, who has been kidnapped by the Russian Mafiya. As Artemis rushes to his rescue, he is stopped by Captain Holly Short of the LEPrecon fairy police. But this time, instead of battling the fairies, he is going to have to join forces with them if he wants to save one of the few people in the world he loves.