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.

Chasing speed, dreams and money, a team of drivers get involved in the slush fund investigation of a powerful figure during the 1988 Seoul Olympics.

Yuna is a famous YouTube influencer but always looks down on others. She is invited to a cosmetic brand launching party but things don’t go the way she had wanted. Tired and extremely stressed, she takes couple of shots and falls asleep after calling a designated driver. When Yuna opens her eyes, she realizes she’s trapped in the trunk of her car. The kidnapper asks her for ransom, not just cash but to broadcast a ‘kidnapping live-stream’ and beg for money from the viewers. But everyone thinks she’s playing out a self-fabricated scenario…

Dong-hyun is a high school student. One day, he falls from the rooftop and bumps into Pan-soo who is a passerby. Pan-soo is a member of a criminal organization. When the two men wake up in the hospital, they discover that they have switched bodies.

A stranger named Jun-woo approaches Jeong-yun and suddenly says that he saw her future of being stabbed to death in 6 hours on her 30th birthday. She doubts his words but soon follows him to find out the murderer to avoid death. However, as they go deeper into the case, she realizes Jun-woo was the key to recent serial killings. Now she is left with the question of whether he is the savior of her life or the devil trying to set her up. Can she survive her fate of death in 6 hours?