Summary: Andy Yeats is stuck in the Middle East, separated from his family; as a global oil crisis unfolds and the world descends into chaos, his wife and young son are in Paris and his teenage daughter is home alone in London.

Summary: Andy and Mika are hunted while they search for the cause of the global crisis. Elena and Sam try to flee France to reunite with Laura. Laura and her friend Owen grow closer, unaware that a mysterious man tracks their every step.

Summary: Andy and Mika try to get home and find answers to the chaos descending upon the world. Elena braves police and looters in Calais to get Sam his eye medication. Laura and Owen must evade the threat that seems to appear at every turn.

Summary: Andy begins working to help solve the global crisis and reveals his personal connection to its cause. Elena and Sam illegally cross from France to England, but they are captured, detained and separated. Laura and Owen face the man following them.

Summary: Faced with the choices of his past, Andy takes on the mastermind behind the crisis to save his family and modern civilization. Elena pieces the clues together and discovers the location of the culprits.