Marble of God (신의 구슬) is an upcoming historical Korean drama set to premiere on jTBC in 2026. Blending action, political intrigue, friendship, and tragic romance, the series takes place in the year 1258, during a time when the Goryeo Dynasty stood on the brink of collapse after decades of war against the Mongol Empire.
This historical K-drama stars Ahn Bo-hyun, Lee Sung-min, Claudia Kim (Soo-Hyun), and Ha Yoon-kyung. With its large-scale historical setting and emotionally driven story, the drama has already become one of the most anticipated Korean series of 2026.
At the center of the story is a secret expedition formed to search for a sacred relic believed to possess the power to save the kingdom.
Story Background: Goryeo in the Middle of a 30-Year War
The year 1258 marks a critical moment for Goryeo. After fighting the Mongols for three decades, the nation has fallen into chaos. The people are suffering, political tensions inside the palace continue to rise, and the royal army is exhausted from endless battles. It is within this desperate situation that Marble of God begins.
Under mounting political pressure and external threats, the kingdom’s leaders make a drastic decision: they send a small expedition to search for the Beads of God, a sacred relic rumored to hold miraculous power. If the relic can be found, many believe it could change the fate of Goryeo itself.
But this journey is far more than a spiritual mission. Hidden beneath it are political ambitions, personal sacrifices, and a forbidden love story that gives the drama its emotional weight.
Baek Gyeol, A Young Commander with a Pure Heart
The main character, Baek Gyeol (played by Ahn Bo-hyun), is a young commander known for his integrity, courage, and sincerity. He is the only son of Baek Cha-seung, a high-ranking official overseeing the kingdom’s military affairs.
As a member of the Gyeonryong Army, the highly respected royal guard unit, Baek Gyeol grows into a disciplined and loyal warrior devoted to protecting Goryeo and its people.
However, his life changes completely when he falls in love with a royal princess.
Princess Kyeonghwa, A Woman Trapped Behind Palace Walls
Princess Wang-hee, also known as Princess Kyeonghwa (Claudia Kim), is the youngest daughter of the Goryeo Emperor. Despite her royal status and luxurious life, she lives in loneliness and sorrow. Political pressure forces her into an unwanted marriage, causing her to shut herself away from the outside world.
She spends her days trapped within the palace walls, living without direction or happiness—until she meets Baek Gyeol.
Their bond slowly deepens, filling the emptiness in each other’s hearts. Yet their love also becomes the beginning of a greater tragedy. The princess’s feelings for Baek Gyeol ultimately lead to his appointment as the commander of the sacred relic convoy. In other words, their love pulls him directly into danger.
The Secret Mission: A Journey to Find the Sacred Relic
The special convoy is led by Baek Gyeol. Their mission sounds simple, but it carries enormous risk: to find the Marble of God, a sacred relic believed to possess miraculous power capable of saving the kingdom from destruction.
The journey, however, is anything but easy. The group must cross dangerous territories while facing threats from Mongol forces as well as political factions hoping to use the relic for their own gain.
Baek Gyeol is not alone. Several important figures join the expedition, each bringing their own strengths and personal burdens.
Choi Koo, A Veteran Soldier Scarred by War
Choi Koo (Lee Sung-min) is a veteran warrior who has survived countless battlefields. Years of war have shaped him into a stern, intelligent man with deep knowledge of military strategy.
He joins the convoy not only as a member but also as an unofficial mentor to Baek Gyeol. Behind his cold and rigid personality lies a painful past that slowly unfolds throughout the journey.
Choi Koo’s presence adds emotional depth to the team, especially within the group’s complicated and often tense dynamics.
Geol Seung, The Tavern Owner Drawn Into the Mission
Meanwhile, Geol Seung (Ha Yoon-kyung) is an ordinary woman who runs a small tavern in Ganghwado. She is known for her warm personality, quick thinking, and deep knowledge of the surrounding region.
When Baek Gyeol searches for someone to guide the convoy, Geol Seung becomes one of his choices. With little room to refuse, she joins the mission despite having no idea how dangerous the journey will become.
Her character brings lighter moments into the drama’s darker atmosphere. Geol Seung adds warmth, subtle humor, and humanity amidst the harsh realities of war.
Main Conflicts: Love, Duty, and the Price of a Nation
Marble of God is not simply a story about searching for a sacred relic. The drama places strong focus on emotional conflicts between personal feelings and duty to the nation.
1. The Love Between Baek Gyeol and Princess Kyeonghwa
Their feelings grow quietly, but their relationship is blocked by social status, political pressure, and looming danger. Their love becomes both a source of strength and the cause of suffering.
2. A Dangerous Mission Against Time
The sacred relic is more than just a legend. Many powerful groups are searching for it, forcing the convoy into a race against time to save the kingdom.
3. Friendship in the Midst of Hardship
The bond between Baek Gyeol, Choi Koo, and Geol Seung is tested through betrayal, sacrifice, and trust as they face increasingly dangerous situations together.
Marble of God (2026) Drama Details
- Title: Marble of God
- Korean Title: 신의 구슬
- Other Titles: Beads of God, God’s Beads, Sinui Guseul
- Director: Jeong Dae Yun
- Writer: Jung Hyeon Min
- Genres: Action, Historical, Romance, Melodrama
- Format: Standard Series
- Country: South Korea
- Episodes: 12
- Cast: Ahn Bo-hyun, Lee Sung-min, Claudia Kim, Ha Yoon-kyung, Yoon Kyun-sang, Bae Jung-nam
- Release Schedule: 2026 (Saturday & Sunday)
- Network: jTBC
Final Thoughts
Marble of God promises an epic story that combines history, heartbreaking romance, and a dangerous journey to save a nation. Through compelling characters like Baek Gyeol, Princess Kyeonghwa, Choi Koo, and Geol Seung, the drama is expected to deliver an emotional and meaningful story about sacrifice, loyalty, and survival.
For fans of historical K-dramas filled with action and tragic romance, Marble of God is definitely one of the most anticipated series to watch in 2026.
