D-6 has heard of some engineering plans done in the 16th Century hidden in a car tycoon's vault in Madrid. Sloan sends Sydney to steal those plans. However, a rival of Sydney's, Anna Espinosa, a Cuban-Russian agent for a Russian spy organization called K-Directorate, is also vying to get the plans. As usual, Syd must deal of her moves with the CIA as well as keeping contact with her new handler after Vaughn is reassigned. Sydney also try to know more of the truth from her estranged and mysterious father to her own past. Meanwhile, Will continues to grow more obsessed with Danny's killing when the police close the case for lack of clues, and Danny discovers that all traffic cameras in the area of Sydney's apartment went off-line during the time of the killing which he believes points to a greater conspiracy.

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