Reclusive Professor David Denlon makes a startling discovery—evidence that advanced humans inhabited the Earth a billion years ago. But wealthy, well-connected Patrick Veeder launches a plan to murder David and steal that evidence. As he struggles to stay out of Veeder's crosshairs, David learns that these highly evolved people left something behind, something they intended for us to find... Can a misfit professor and his thrown-together team translate the instructions from our long-lost sister race before Veeder's evil plan succeeds?