"Based on a true story. The North Korean Special Unit 124 infiltrated South Korea, in January of 1968, with one clear goal: To kill President Park Chung-he. They failed. But they were close to succeeding. Real close.
In light of this unprecedented move South Korea has no choice but to come up with a counter attack. They form their own special group, designated The 684 Special Unit. The unit is loaded with convicts, 31 men with either life imprisonment or death sentences hanging over their heads, men with nothing to lose. The group is brought to the island Silmido, and given an ultimatum: Either you go back, and serve out your sentence, or you stay here, and take on a special mission. What will it be?"
