One day, Joon Woo wakes up to find that a mysterious virus outbreak has occurred. The outbreak suddenly spread throughout Seoul and rapidly grows out of control, trapping survivors alone inside their apartments without access to cellular data, Wi-Fi, texting, or phone calls. Joon Woo and Yoo Bin struggle to survive in an isolated apartment complex from those infected with the virus. Based on the original scenario by Matt Naylor.
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