100 Days of Deception (100일의 거짓말) is an upcoming 2026 South Korean period espionage television series directed by Yoo In-shik and written by Ryu Bo-ri. Scheduled to premiere on tvN on October 10, 2026, and broadcast internationally via Netflix, the drama is set in 1932 Gyeongseong under Japanese colonial rule. The narrative follows a skilled pickpocket who assumes a fake identity to infiltrate the Japanese Government-General of Joseon as an undercover spy for the independence movement. Over the course of a 100-day mission, her operation collides with an elite interpreter who is the son of the Inspector General. The ensemble cast features Kim You-jung and Park Jin-young.