America is under attack by a unknown group called the Engineers a series of planned attacks each with timer against American interest however with 3rd Echelon officially defunct, dissolved and disavowed the President of the USA had officially launched A "Blacker than Black" ops team called 4th Echelon to be lead under none other than Sam Fisher the most revered and feared agent of the previous echelon but this time he is not alone an old face reappears and its none other than Sam's old colleague and Senior Chief Operations Anna Grimsdottir and they aren't the only ones to join... Charlie Cole a hacker and technology expert working under Sam's best friend's private security company and the CIA's best operative Isaac Briggs appointed by Anna herself to join for mission support what simply started as an easy recon operation turned into a high stakes race against time
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