Main characters

Carla Romero Vázquez

Intelligence Officer of the CNI of Spain
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Ngoc Khánh

Captain of the Vietnam Guard Police High Command

Alberto Romero de Soto

Medical Captain of the Nomadic Troops of the Spanish Army
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Ngoc Khán

Underground cave expert

Other characters

Juan Costa

Field agent of the CNI of Spain

Jesús Castaño

Deputy Director of the CNI of Spain

Miguel Ramírez

Consular Security Attaché

Dmitry Korsakov

U.R.S.S. Colonel

Chen Mai

Vietnamese Business woman

Ngoc 'Silvia' Suong

Freelance coder

Minh Huyen

Tourism Agent

Nham Tuyet

Vietnamese peasant

Quan Huy

Major of the Vietnam Guard Police High Command