The story follows the assassination of the North Korean dictator’s half-brother, Kim Jong-nam - who was attacked at Kuala Lumpur airport in February by using the lethal nerve agent VX. The incident - caught on CCTV - uncovers the activities of North Korean secret agents who were at the airport on the day of his murder, as well as to unravel the family feud that led to it and the international business network that has allowed the Kim family to stay in power for nearly 70 years.