Eric and Oliver plunge into a world of espionage when a CIA spy disguised as an American diamond broker traveling with her family is kidnapped in Vienna. Also, Oliver gets an interesting job offer.

As Eric negotiates the release of an arms dealer's son from a kidnapper, he uncovers a larger plot to destroy hundreds of lives. Also, Zara is shaken when she must work with an abusive ex-colleague in order to prevent this terrorist attack.