The basic plotline is thus: Sam Fisher's daughter has died and in a fit of grief, he is throwing himself into his work - taking his most dangerous mission ever. His job is to infiltrate a terrorist cell called the JBA, and to do that he has to help bust one of its members out of prison. Back at the JBA headquarters, Sam has to live a dual life, carrying out the orders of the JBA (blowing things up, killing people and the like) whilst also keeping tabs and reporting back to the NSA, his government employers.

Read Here