Emily St. John Mandel meets The Ministry of Time. 
UCLA mathematician Kat Watburn attends a sound bath in Joshua Tree and is struck by visions of near-future catastrophe: a geomagnetic storm capable of collapsing the global power grid. The next day, her estranged father calls from Peru with news of his own disturbing experience and a discovery - advanced equations carved into prehistoric stone. 
United by a mysterious, otherworldly messenger, father and daughter embark on a globe-spanning, puzzle-driven adventure through archaeological ruins, racing to unlock an ancient code that may be humanity's only hope.