100 Days of Deception Poster: Five Windows, One Dangerous Spy Mission

One cake, one gun, and a glass of champagne. tvN’s new poster for 100 Days of Deception packs a whole thriller into a single building at night, and fans are…

By Reetam Bodhak

October 24, 2026

2 min read

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One cake, one gun, and a glass of champagne. tvN’s new poster for 100 Days of Deception packs a whole thriller into a single building at night, and fans are already trying to decode every window.

100 Days of Deception : Overview

Detail	Info
Drama	100 Days of Deception
Network	tvN
Genre	Period spy romance
Lead Cast	Kim You Jung as Lee Ga Kyeong, Park Jinyoung (GOT7) as Kim Tae Woong
Setting	Japanese occupation of Korea
Air Time	Saturdays and Sundays at 9:10 p.m. KST
Next Episode	October 24 at 9:10 p.m. KST

What Is the Story About?

Lee Ga Kyeong is a pickpocket who becomes an undercover spy for the independence movement. Her mission is to infiltrate the Japanese Government-General of Korea. There, she gets tangled up with interpreter Kim Tae Woong, also known as Sato Hideo, the adopted son of the Inspector-General of Korea, the second-highest-ranking official in the administration.

What Does the New Poster Show?

The poster shows the Government-General building at night, with five lit windows. Each window reveals a different character doing something suspicious:

Window	Character	What They’re Doing
1	Lee Ga Kyeong (as Geum Seo Hee)	Glancing around while pushing a cart with a five-layer cake
2	Sato Hideo	Pointing a gun at someone
3	Yoo So Ran	Reaching into her bag
4	Yoo Philip	Writing in a notebook
5	Sato Shinichi	Standing at the top with a champagne glass

The tagline reads: “Plant a spy inside the Japanese-Government General of Korea.”

Why This Poster Works?

Clever storytelling: One image hints at several plots running at once.
Unanswered questions: Why does Sato Hideo draw a weapon inside the building? How will Yoo So Ran and Yoo Philip’s separate plan connect to Ga Kyeong’s mission?
Rising tension: Last episode, Ga Kyeong faced a crisis right after a secret phone call, when Sato Hideo turned up outside the door.

Why You Should Watch?

If you enjoy period dramas with tense spy plots, undercover identities, and slow-burn romance, this one delivers all three. Kim You Jung and Park Jinyoung also give the story star power on both sides of the secret.

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