It’s been a year since Gabe, Marty, and Elizabeth’s last adventure, and Gabe is starting to wonder if Thrylos will ever summon them again. But then, the magician himself shows up at the Lovejoys’ door one day, frantically summoning them in person to their biggest assignment yet. Not only will he be going along this time, but they will also need the help of other magicians and apprentices, too. Their assignment: to stop an asteroid bound for 1908 London, the largest city on Earth at the time. 

The kids meet magicians and apprentices from all across time and space, teaming up with a trio from just 10 years in their future. Gabe develops a crush on Eva, who teaches him more about their rival, the evil magician, whom Gabe learns is named Kakovoulos.

Elizabeth makes fast friends with Eva’s younger sister Hope. Marty and the girls’ neighbor Joey become rivals, each helping the team at large figure out how to stop an asteroid with just the technology available in 1908, plus a few things they can easily steal from various different points in history.

It’s a race both through time and against time, taking the kids to medieval Scotland, to the forests of Russia, and, of course, into outer space as they attempt to save the world from the most devastating asteroid event in recorded history! But will they manage to divert the asteroid away from its course toward Earth? Or, will it still enter earth’s atmosphere, causing untold devastation?