Mandela Effect

Tae-ho, an inspector on a counterterrorism unit, has exceptional eyesight and a prodigious memory. He is certain he had a five-year-old son, Young-mo — but neither his wife nor his colleagues remember the boy. Dismissed as a madman, he is approached by Ri-woo, a researcher for an organization that monitors tampering with the timeline, who hands him a tape of Tae-ho and Young-mo together. A mysterious group has been changing the past to erase politically important figures — and Young-mo was erased along with them. Travelers can only reach places in the past that were covered by CCTV and their immediate surroundings, and each must die, be broken down to the quantum level and be reassembled. To get his son back, Tae-ho throws himself into the agonizing journey.