A high-budget war epic, Road Number One commemorates the sixty years that have passed since the Korean War. It's based around the historical Route 1, a national highway that served as the main passageway between North and South Korea during the outbreak of the Korean War in 1950. Lee Jang Woo, the son of a poor peasant, has been in love with his master's daughter, Soo Yeon, since childhood. He joins the military in order to put her through medical school and becomes a brilliant officer, leading his men to victory through guerilla warfare. Mistakenly believing that Jang Woo was killed in battle, Soo Yeon becomes engaged to military officer Tae Ho. Jang Woo returns on the eve of their wedding, and the two are briefly, painfully united, but the eruption of war tears them apart once again, forcing him to fight alongside Tae Ho on top of everything. Jang Woo keeps fighting to get back to his love, but the war continues to find new ways to keep them apart. Leading drama stars So Ji Sub and Kim Ha Neul portray star-crossed lovers who are torn apart by war.
As soon as Soo Yeon hears that Man Yong had stepped on a mine, she prepares to treat him and follows Dal Mun.
Without the presence of Jang Woo, the Second Company's First Platoon gets isolated within the enemy's camp.
Tae Ho is told that Soo Yeon is alive and goes finds her to get her to treat Jang Woo's emotional illness.
As the Chinese People's Volunteer Army gets closer to attack the remnants of the Korean Second Company and the US Army soldiers, Jang Woo requests the Battalion Headquarters to fire within the position.
In order to save his men, Jang Woo decides to lead his men back North, towards Pyeong Yang. Tae Ho argues that he is not doing that for the sake to save his men, but to use them as a human shield to help him get back to Soo Yeon.
Jang Woo and his troops remain in Pyeong Yang to protect the line of defense but are outnumbered by the Chinese People's Volunteer Army and are forced to retreat.
Tae Ho stands as a testifier at Soo Yeon's hearing and states that he was affected by her doings, but also states that if it hadn't been for her, none of the soldiers in the Korean Armed Forces would have gotten treatment.
After treating Jang Woo's wound, Jang Woo decides to secretly run away with Soo Yeon.
Once Soo Yeon finds out that she lost her baby, she loses all hope in life and is ready to give up on saving other people's lives, when Myung Ho holds her hand, saving her from despair.
Both the Korean Armed Forces and their allied forces are in the run to get to Pyeong Yang first to win the honor of becoming a war hero. While advancing to the North, the Korean Armed Forces mistaken the US Armed Forces as their enemy and attack them.
Jang Woo plans a potential suicide mission to take back road number one and stresses that the Second Company will keep the promise they made to their comrades and win back their honor.
Tae Ho disobeys the orders given by Jang Woo, trusts the words of the captured North Korean Lieutenant which results in the death of many of their men.
As soon as the Company arrives to a nearby village, they find that the people of the village were holding two North Korean soldiers as prisoners.
After reclaiming Dabudong's 674 Hill from the North Korea, the Second Company is faced with the historical event of crossing the Nakdong River.
Tae Ho decides to send Jang Woo, who is under arrest for insubordination, as the leader of a Special Force to ambush the North Korean soldiers at the 674 Hill.
Soo Yeon is told that her brother, Soo Hyuk, will be leaving for Pyeong Yang in his sick condition. She knows what will happen to her brother if she does not go with him, so she decides to get on the boat, and once again, leave Jang Woo's side.
Tae Ho's platoon is loosing men left and right do to the fact there are so many men that were never meant to serve in the army.
Thanks to Jang Woo's strategy the Southern soldiers are able to ambush the Northern tanks and the civilians are able to cross the river safely.
The North has unexpectedly pushed forward and the stationed soldiers must protect the civilians still in the village. Tae Ho soon realizes that Soo Yeon's brother was a member of the Communist Party.
Jang Woo leaves behind his childhood love Soo Yeon, in order to earn money as a soldier and support Soo Yeon's dream of becoming a doctor.
A high-budget war epic, Road Number One commemorates the sixty years that have passed since the Korean War. It's based around the historical Route 1, a national highway that served as the main passageway between North and South Korea during the outbreak of the Korean War in 1950. Lee Jang Woo, the son of a poor peasant, has been in love with his master's daughter, Soo Yeon, since childhood. He joins the military in order to put her through medical school and becomes a brilliant officer, leading his men to victory through guerilla warfare. Mistakenly believing that Jang Woo was killed in battle, Soo Yeon becomes engaged to military officer Tae Ho. Jang Woo returns on the eve of their wedding, and the two are briefly, painfully united, but the eruption of war tears them apart once again, forcing him to fight alongside Tae Ho on top of everything. Jang Woo keeps fighting to get back to his love, but the war continues to find new ways to keep them apart. Leading drama stars So Ji Sub and Kim Ha Neul portray star-crossed lovers who are torn apart by war.
as Lee Jang-woo
as Kim Soo-yeon
