If they open the gate, the enemy will take the fort. Kim Shi-min makes a painful decision not to open the gate. Knowing that Kim has no other choice, Commander Yu and his men bravely fight to the death outside the gates of Jinju against 30,000 Japanese soldiers. The soldiers and citizens of Jinju are petrified watching the atrocity from inside the fort. Kim Shi-min devises another strategy. The fierce battle continues for six days and nights. Ammunition completely runs out, and Kim Shi-min orders women and children out of the fort. They can't go leaving the men who are facing certain death. Will Jinju Fort be saved? August, 1593, peace talks are being exchanged between Ming and Japan. Strongly against the peace talks, King Sonjo issues a new order to Yi Soon-shin.
—https://www.yidio.com/show/the-immortal-yi-soon-shin