Due to sudden deteriorating weather conditions, visibility on the Airport Bridge is severely impaired, leaving people stranded and at risk of the bridge collapsing due to a series of chain collisions and explosions. Amidst the chaos, the canine subjects "Echo" from the military experiment "Project Silence," who were being transported in secret, break free, and all human survivors become targets of relentless attacks.

Two men who lost their respective twin brothers develop a growing friendship after meeting in a support group. However, both harbor long-hidden secrets that threaten to tear them apart.

Though it places his own life in danger, a look-alike commoner secretly takes the place of a poisoned king to save his country from falling into chaos.

Young-goo the son of mafia boss Don Carini, is too foolish to be part of the mafia elite. One day, Young-goo comes to his father and is trained by Tony V to be his father's successor. A few days later, Young-goo accidentally rescues Nancy, the only daughter of Don Bonfante, the boss of a rival mafia family. But Vinnie, an under-boss of the Bonfante family kidnapped her and fabricates that Young-goo has taken her. Vinnie's behavior provokes an armed conflict between the two families.

Joong-ho is a dirty detective turned pimp, who's in financial trouble as several of his girls have recently disappeared without clearing their debts. While trying to track them down, he finds a clue that the vanished girls were all called up by the same client, whom one of his girls is meeting with right now.

In a future where a failed global-warming experiment kills off most life on the planet, a class system evolves aboard the Snowpiercer, a train that travels around the globe via a perpetual-motion engine.