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.

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.

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.