The search for Kate Reece takes Danny and Lexi to Vietnam, where they reunite with none other than Aiden Shaw. Lexi's fighting skills are put to the test as the team infiltrates the dangerous Black Lotus - an underground fight club - where they learn about a vicious new terrorist.

A visit with Simon in prison yields new information on the Spirit Banner's last whereabouts, sending the team to Russia.

Danny and Lexi join forces with Levchenko's gang as they journey to Mongolia. Levchenko hopes to find the Spirit Banner for himself, even with the Great Khan's horde in hot pursuit.

In search of the Spirit Banner, Simon attempts to make a deal, unaware that Lexi, Danny and Shaw are on his tail. What they uncover leads them to Hong Kong while Danny becomes increasingly concerned with Violet's control over Lexi.

After crash-landing in the jungles of Laos, Lexi is gravely injured, leaving Danny and Patrick in a rush to find refuge. Meanwhile, Chuck uncovers new information on the relationship between the Vatican and the CIA.

While their team gets closer to unlocking the location of the Spirit Banner, Danny is forced to pick sides between Lexi and Kate.