The door of time opens between the swordsman who wants to seize the legendary divine sword at the end of the Goryeo Dynasty and those who chase after an alien prisoner imprisoned in a human body in 2022.
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https://www.youtube.com/watch?v=SJLzCU0CYIM
A father has a recurring dream of losing his family. His nightmare turns into reality when the planet is invaded by a force bent on destruction. Fighting for their lives, he comes to realize an unknown strength to keep them safe from harm.
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https://www.youtube.com/watch?v=68_WcOyGHj0