When their twin nieces abscond with a time-flyer, Toni and Jeff, against Jeff’s moral standards, are forced to follow them through time. After finding them the twins evade them and they are forced to follow them through time once again and make several startling discoveries. When they return to Earth they discover, to their dismay, a universe facing desolation in which they come face to face once again with moral and religious issues in order to save humanity. Toni is convinced there is a connection between the clone centre and the penal colonies and contrives her own arrest. Jeff follows the IPCF vessel to a far planet and after joining up they find out to their horror how human spare parts are manufactured
