George and the other Lazarus Project agents attempt to track down the time machine that was used to send Janet back to 2012 - a machine powerful enough to break through the checkpoint and travel back further in time. But will they succeed in finding this impressive machine? The impending end of humanity isn't the only thing on the Lazarus agents' minds - romance is blossoming between some, while friendship and love is tested between others. And when an unexpected visitor from the past comes looking for George, he realises that the repercussions of unlimited time travel are further-reaching than anyone could ever have imagined…