Sydney unwillingly teams up with her father to hunt down a modern-day samurai, named Kazu Tamazaki. Meanwhile, Nadia is back home in Argentina and refuses to go back into the spy business. But she is forced to when Sydney's life is jeopardized when she's taken captive by the brutal Tamazaki. Sydney finds out the reason behind Jack's misdeed and Nadia makes an unsettling promise to Sydney to find out who murdered Irina.