Three elderly men are contacted by the South Korean Bureau of Investigation. A North Korean soldier had deserted to the South and one of these three may be his father, however he has no memory of his father's given name or what he looked like.
After completing his required decade of military service and being honored as a hero, a North Korean sergeant makes a sudden shocking attempt to defect to the South, risking life and limb for the chance to finally determine his own destiny.
Detective Chief Superintendent Maurice Jobson is forced to remember the very similar disappearance of Clare Kemplay, who was found dead in 1974, and the subsequent imprisonment of local boy Michael Myshkin. Washed-up local solicitor John Piggott becomes convinced of Myshkin's innocence and begins to fight on his behalf, unwittingly providing a catalyst for Jobson to start to right some wrongs.
After a high-ranking North Korean official requests asylum, KCIA Foreign Unit chief Park Pyong-ho and Domestic Unit chief Kim Jung-do are tasked with uncovering a North Korean spy, known as Donglim, who is deeply embedded within their agency. When the spy begins leaking top secret intel that could jeopardize national security, the two units are each assigned to investigate each other.
On 31 January 1968, 31 North Korean commandos infiltrated South Korea in a failed mission to assassinate President Park Chung-hee. In revenge, the South Korean military assembled a team of 31 criminals on the island of Silmido to kill Kim Il-sung for a suicide mission to redeem their honor, but was cancelled, leaving them frustrated. It is loosely based on a military uprising in the 1970s.
Romulus, a misunderstood musician turned recluse hiding from personal demons in a New York City cave, finds the frozen body of a young drifter in a tree. The authorities, including his police officer daughter, claim the death is accidental. Romulus is convinced the man was murdered by a prominent art photographer but how can he prove he's right when everyone thinks he's insane?