Five strangers meet after one of them gains possession of the original manuscript of the cult graphic novel.

Ian and Becky, unable to ever return to their old lives, are forced to face the terrifying reality of life on the run; Dugdale is drawn deeper and deeper into a plot that threatens to have fatal consequences.

The gang feels the full weight of the Network's power as Grant is framed for a shocking crime; they are forced to make a new ally.

The group takes refuge in a deserted manor and attempts to decipher the secret meaning of the manuscript.

The gang's attempt to disrupt the Network's plans backfires leaving one of them in danger; Arby's confession to Jessica has damaging repercussions; Becky is left with an impossible choice.

The vaccine is ready to be shipped throughout England; Becky and Wilson face tough choices; someone close to Michael is not what they seem.