When a brilliant young boy solves the most complex puzzle in the
history of mankind, he and his caretaker sister are transported to
Gossamyr, a magic place where math is the language of magic and the
boy's unique condition gives him incredible power.
Denny Auramen, a young boy on the autism spectrum, moves in with his
older sister Jenna following their parent's divorce. Finding it
difficult to shoulder so much responsibility, Jenna pushes Denny to
solve an ancient theorem that he believes is dangerous, in order to get
him into a prestigious math program. The theorem sends the children to
the world of Gossamyr, a place where math is magic and an ancient evil
has been unleashed. Here, Denny's gifts make him a powerful Arithmancer,
but this only complicates the stranded siblings' already strained
relationship. Together, Jenna and Denny must find a way to navigate this
treacherous land to not only find their way home, but back to each
other.