One hundred years ago, aliens landed on a mountain near where a small, white five tailed fox lived. After being stranded on Earth for one hundred years, they are ready for a test flight to see if they can return home. The test fails as one of the aliens makes a mistake, and the other aliens tell him to leave.
In the Middle East, a bomb is set off that creates massive earthquakes. Meanwhile, in South Korea, a young couple is about to get married and the tension builds when South Korea sends a manned space capsule to investigate the bomb site. The earthquake makes its way to South Korea, caused by a giant monster named Yongary (inspired by a mythical creature in Korean lore). Yongary attacks Seoul and makes his way to the oil refineries where he consumes the oil. A child related to the aforementioned couple turns off the refineries' oil basins; Yonggary, enraged, starts attacking until a chemical explosion at the refinery proves to have an effect on it. The Korean Government then uses oil to draw Yonggary on a local river, and kills it with a refined version of the ammonia compound.
An archaeological party explore some caverns underground. Dr. Campbell and Dr. Hughes are the two leaders of the archaeological expedition, and get separated. While Dr. Hughes finds an alien corpse with a fossilized diamond, Dr. Campbell finds hieroglyphics at the cost of the party except for Hughes and himself. Two years later, Campbell and his assistant Holly are digging up the bones of Yonggary, a gargantuan dinosaur 50 times the size of a Tyrannosaurus Rex. Out of nowhere, people slowly are being killed around the site. While Holly is working, Dr. Hughes, who has been legally dead for 2 years, goes to Holly and tells her to stop the dig. Dr. Campbell comes into the tent and sends Dr. Hughes off. Holly quits the expedition when another "Accident" occurs. In the town bar, Dr. Hughes finds Holly and takes her back to her Hotel room to tell her why he thinks the bones of the Dinosaur, which he calls Yonggary, are going to bring the end of the world. After explaining, Holly and Hughes go to the site to stop Campbell but it is too late and Aliens resurrect Yonggary. After Yonggary's first appearance, the Army comes in and takes Holly and Campbell to an army base when Yonggary is dispatched by the aliens again. The army sends choppers after Yonggary, but he destroys them. Yonggary is then sent to the city (which was thought to be New York by fans, but is actually an all CGI Los Angeles near Korea Town) and does some damage, where some jets attack him. Then Yonggary is transported to a power plant where he is attacked by rocket pack soldiers. During the fight, Hughes and Holly find out that the diamond on Yonggary's forehead is the device giving the aliens control of Yonggary. Yonggary is transported back into the city, where the remainder of the soldiers destroy the diamond on his head. Enraged, the aliens send down their own monster, Cycor. Yonggary and Cycor battle, with Yonggary winning. The following morning, Yonggary went to sleep and sent to an uninhabited island where Yonggary can adjust to normal life and become a hero.
Yeong-soo et Min-jeong, la quarantaine, sans occupation notable, vivent en couple, chez lui. Leur relation dépérit depuis qu'ils ont décidé d'arrêter de boire. Elle boit sans lui dans certain débit de boisson. Après une scène, elle décide d'arrêter de se fréquenter, et retourner habiter chez elle. Il souffre de cette séparation, en témoigne une douleur à la jambe, qui exige un grand pansement, des béquilles, et entraîne une sorte de dépression. Pendant qu'il la cherche, croit la retrouver, rêve d'une reprise, elle est le plus souvent dans un bar à lire un roman et à boire un peu. Un homme disponible s'intéresse à elle, engage la discussion, et commence une relation tendue. Elle prétend qu'elle est sa jumelle, et ne peut avoir aucun souvenir. Ils se revoient, puis se séparent. Un autre homme, cinéaste, disponible... Enfin, Yeong-soo finit par la rencontrer, et accepte son jeu ou son amnésie. Et ils recommencent pour la première fois. Des individus, isolés, esseulés, absents, vivent mal leur manque de relation, se croisent, sans souvenir avoué, sans espoir d'avenir, dans le présent, à tâtons, «ivres d'amours et de virtualités» (Mathieu Macheret) .