在超人警備隊阿島隊員的故鄉，有市民目睹一條古老的村在剎那間出現，又在瞬間突然消失了……根据研究，有可能是外星人運用「得奇粒子」的能量，令時空產生變化，把已成歷史的老村莊重現眼前，產生時光倒流的現象……村中一位老伯的手掌上，有幾度神奇的貝殼傷痕，時光倒流，把這位老伯帶回歷史之中，揭開了一幕幕感人的往事……故事中男主角背棄盟誓，一去不返，現在是女主角報復的時候了。到底外星人跟這個故事有何關係？七星俠又如何對外星人？

裴刚（欧威 饰）自幼受到奶奶（付碧辉 饰）的溺爱，性格飞扬跋扈，桀骜不驯。在一次口角之中，裴刚受人陷害被迫杀死三人，被捕入狱，判处死刑，秋后问斩。尽管奶奶和刑曹（周少卿 饰）想方设法想要挽救裴刚，但裴刚拒不配合，对自己的罪行供认不讳。裴刚为家中三代单传，为了裴家不断子绝孙，奶奶将名为莲儿（唐宝云 饰）的女子送入牢中，让裴刚传宗接代。当夜，奶奶冻死在路边，裴刚得知此事良心发现痛不欲生，他和莲儿之间亦产生了真挚的感情结为夫妻。随着时间的推移，裴刚处刑的日子越来越近，此时莲儿的腹中已经怀上了裴刚的骨肉。牢头（葛香婷 饰）被裴刚和莲儿的经历所打动，想要偷偷放跑裴刚，却遭到了后者的严词拒绝。

根据韩战期间真实战事改编。1950年6月25日，北韩挥军越过三八线突袭南韩，三日攻陷汉城（今首尔），战线不断南进。在美军及联合国军支援下，南韩军逆势反击。美军指挥官麦克亚瑟提出代号为「铁铬行动」的仁川登陆计划，该计划急需一支大队的兵力从侧翼阻击扰敌、声东击西，通过长沙里切断北韩军的补给线。由于任务本身极其艰钜，加上南韩国军当时兵力薄弱，无法抽调足够正规军支援，军方不得不把这项任务交付给772名学生兵执行，这些学生兵平均年龄只有17岁，仅仅接受了两星期的军事训练，在毫无实战经验的情况下投身战场。行军路上固然杀机重重，战友内部也诸多衝突，年少气盛，迸发出各种角力。仁川登陆战前夕，长沙里登陆任务如期执行，这群徒有一腔热血但战力薄弱的学生们，无可避免地接受命运中最残酷的考验：穿越炮火与海浪，浴血长滩，馀下部队身陷敌军重重围剿，直至弹尽粮绝，挣扎于阵亡与倖存的分界线上…Based on the incredible true story of Jangsari Landing Operation. When North Korea invades South Korea on June 25, 1950, they pushed South Korea and its ally US Army to the southernmost city. U.S. General MacArthur planned Operation Chromite, which would see the joint allied forces to take back a strategic location of Inchon and in order for it to succeed, he needed a small battalion to flank the North Korean army and eliminate their supply line at Jangsari beach.Having lost his family on his retreat away from North Korea before the War, a model student Choi Sung-pil enlists in the army to fight for the South. Ki Ha-ryun is a rebellious youth from the South who volunteers to fight in the war. All of the 772 students and youths are like them who are barely out of school with only 2 weeks of boot camp training. Task force commander Captain Lee Myung-jun knows that it’s a long shot, but he has no choice but to lead them into a crucial mission. Meanwhile, US war correspondent Maggie braves the dangers of the battlefield to report on the war in the frontlines. She feels empathy for the Korean students who must go into battle on behalf of the veteran soldiers for their country, and tries to do what she can on her end to rescue them.With little ammo, scant food supplies and raggedy weapons, can the students successfully carry out their mission and return home safely?

继《世外桃源的传说》三部曲的故事之后，世外桃源的英雄们必须团结起来，保护人类免受邪恶的神秘会的伤害。神秘会使用失控的黑暗魔法，召唤可能会摧毁世界的古老泰坦。