Luci Sykes, maliciously deprived of oxygen at birth, is subjected to a lobotomy at thirteen by her powerful father. She emerges from her childhood silence to become the supernova genius behind Olympia Navigation, producer of the world's most intuitive GPS systems.

When her hermetic mother, Maggie, dies, events are set in motion to embroil Luci's twin brother, Tokker, separated from at birth and long hidden on a subsistence farm in the Midwest, and BEACON, Olympia's penultimate GPS system, in a plan to foil Luci's suspected plot to end the human race. Tokker and BEACON embark on a cross-country scavenger hunt spanning Oregon to New York, abetted by the likes of Tilda Swinton and Daniel Day Lewis in this darkly funny, unlikely buddy story of humans and machines and the earth.