Inside North Korea, veteran Fourth Echelon agent Sam Fisher finds himself on the run when a top-secret covert mission goes fatally wrong. Betrayed by his allies, hunted by his adversaries, and disavowed by his own agency, Sam is stranded deep inside hostile territory - and his only chance of survival is to uncover a murderous plot that reaches into the heart of the hermit state, and beyond. Meanwhile, Fisher's estranged daughter Sarah risks everything to assemble an off-the-books effort to find her missing father before his luck runs out - but the conspiracy that framed Sam goes deeper than either of them realize...