On a fateful night just before Christmas, amidst the chaos of the COVID-19 pandemic, two men in Seoul embark on a dangerous heist. They break into a shipping container from China, expecting to find gold jewelry. However, their plans take a dark turn when they encounter a cat that suddenly attacks one of them, leaving him with a scratch that will change everything.
As the men retreat from the scene, the scratched man, Wang-i, begins to feel unwell. His concerned friend tries to help him, but in a shocking twist, Wang-i turns on him, attacking and biting his throat before rolling into the nearby river. The current carries him to the bustling Gangnam District, where he emerges from the water, drawing public attention as he devours a chunk of raw, bloody meat in the streets.
Meanwhile, Hyeon-seok, a former taekwondo champion, has recently relocated to Seoul to work at a small online streaming firm located in a Gangnam office building. He harbors a crush on his co-worker, Min-jeong, but she disapproves of him. Adding to the tension, their selfish boss, Tae-soo, harasses Min-jeong and struggles to turn a profit, leaving his employees unpaid.
The following day, chaos erupts when Wang-i appears in the building, attacking people and turning them into bloodthirsty zombies. The infection spreads rapidly, and Soon-ja, a renter in the building, takes charge by locking the exits, trapping everyone inside. She and a wounded security guard rush to inform Hyeon-seok and Min-jeong of the dire situation.
Seizing the opportunity for profit, Tae-soo insists on filming the unfolding horror. However, their plan backfires when they are discovered and attacked, leading to the gruesome deaths and infections of most of the group. With phone lines blocked and no help in sight, Hyeon-seok and Min-jeong must fight their way out, but they soon find themselves cornered in the entrance hall.
In a moment of bravery, Hyeon-seok shelters Min-jeong inside a minivan before rejoining the fight. Just as he is overwhelmed by the zombies, Min-jeong comes to his rescue with a fire extinguisher, allowing them to escape to the building’s parkade. However, their relief is short-lived as they are confronted by both Wang-i and Soon-ja. In a fierce battle, they manage to take down the zombies, but Hyeon-seok suffers a bite from Soon-ja.
Realizing the grim fate that awaits him, Hyeon-seok shares a heartbreaking farewell with Min-jeong. Just when all hope seems lost, they discover that Soon-ja was wearing dentures, which means Hyeon-seok is spared from infection. With renewed determination, they make their way to the garage’s roof, but Wang-i, having recovered from their earlier confrontation, is hot on their trail, leaving their fates hanging in the balance.
This thrilling tale of survival amidst a zombie outbreak in Gangnam is a must-watch for horror enthusiasts. As Hyeon-seok and Min-jeong navigate the chaos, their story captivates and keeps viewers on the edge of their seats. Don’t miss your chance to experience the excitement—watch “Gangnam Zombie Watch Free” and immerse yourself in this gripping adventure!