The series is based on the plot of the eponymous bestseller by British writer Alex Scarrow. It tells the story of a family fighting for survival in a world suddenly plunged into chaos. Oil chemist Andy Nielsen goes on a business trip to the Middle East. Meanwhile, an oil crisis breaks out in the world. Against the backdrop of rapidly spreading disorder, Nielsen does everything he can to reunite with his wife and children. His daughter is in the UK, while his wife and son are in France.