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The escape of deadly Sarin nerve gas in a London hotel alerts British Intelligence that a terrorist cell is operating in the city. Joined by American counter-terrorist agents from the FBI, CIA and NSA, the search begins for the terrorists' next target.

The escape of deadly Sarin nerve gas in a London hotel alerts British Intelligence that a terrorist cell is operating in the city. Joined by American counter-terrorist agents from the FBI, CIA and NSA, the search begins for the terrorists' next target.

Although the inter-agency team is officially disbanded after a terrorist bombing in Nigeria, the agents decide to stay together and pursue the deadly and determined terrorist cell.

As the terrorists prepare to strike in the American heartland, Muhammad, the leader of the terrorist cell, convinces some young boys in Jordan to Join his cause.

A CIA team lands in Syria and storms a house where they believe Muhammad is staying. Later, agents in the United States and Jordan attempt to stop two separate terrorist attacks - unaware that the final stage of a second Sarin gas attack in London is already in motion.

A CIA team lands in Syria and storms a house where they believe Muhammad is staying. Later, agents in the United States and Jordan attempt to stop two separate terrorist attacks - unaware that the final stage of a second Sarin gas attack in London is already in motion.