A global invasion. A ravenous alien enemy. Generations of slaughter. Near the end, only the very young and the very old remain. Extinction looms. Driven to extremities of existence, a dying people conceive a terrifying last-measure plan - the forced conscription of one billion elderly citizens. Violently regenerated to a youthful state, these unwilling warriors will muster as a single army to feed the gristmills of an endless war. For victory or defeat, an entire generation must gamble their last desperate seconds.