Ex-operative Tom Keen is recruited by the head of an international security firm to help rescue a kidnapped CIA agent; in the course of the mission, Tom discovers evidence of a conspiracy within his own family.

When an American journalist and close family friend of Scottie is falsely arrested for espionage in a dangerous foreign country, the Halcyon team mounts a last-ditch effort to rescue him before time runs out.

A plane crash in the Ural Mountains sends Tom and Nez to Russia on a covert operation to infiltrate a mysterious, top-secret military facility; Scottie enlists Mr. Solomon to find answers about her husband.

When ruthless terrorists escape from a black site prison in Manhattan, Tom and the Halycon team must lock down the city and find the terrorists before disaster strikes.

Tom and Mr. Solomon go under cover on an international flight that they believe will be hijacked by a ring of ruthless thieves who steal classified material; Howard urges Tom to find proof of a conspiracy orchestrated by Scottie.

The Halcyon team must make a dangerous choice when professional kidnappers abduct a wealthy businessman and his family.