One day, Han Tae Sool uncovers an unreliable truth revolving around his brother's death. From here, his dangerous journey begins. He takes on a dangerous path to bring to light hidden beings that secretly reside in the world.
Beautiful actress Park Shin Hye, on the other hand, stars as an elite warrior named Kang Seo Hae. She's a brave and strong woman who can take down the biggest men with just her bare hands. She's trained to fight, make bombs, and is she's also a sharpshooter.
Kang Seo Hae developed these skills to survive a world dominated by gangsters and military troops. After her long and dangerous journey, she crosses paths with Han Tae Sool and saved him.