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…

When the time machine doesn't work in the way they'd planned, George and the other members of the Lazarus mission are left stranded in the wrong year – but could somebody be conspiring against them? As the team work to fix the technology that will allow them to continue their mission, they find it impossible to ignore the temptation to relive, and maybe even rewrite, their past. Confronted with a number of Lazarus Project secrets, George and the team look for answers from the past in the hope that they will fix the problems of the present.