Boone had a talent. When threatened he could "step around a corner" into some otherwhere. Boone stepped into the box, taking Corcoran with him. The box turned out to be a time traveler machine that transported them back to 1745 England, where they found a family of refugees from a million years in the future. In that far future, alien Infinites were converting humanity to incorporeal form. When the family had refused conversion, they had to flee. For more than a century, the family had lain hidden in their time bubble.
Suddenly, the Infinites' killer monster broke through--and things grew complicated as the family fled to the distant past and the farther future.