The story takes place in modern day South Korea. Mysterious creatures known as "Trouble" suddenly appeared 30 years ago, wreaking havoc and destruction wherever they go. The world has fallen into utter chaos. A select few humans, dubbed "Trace," possess extraordinary powers and are the only ones capable of defeating the "Trouble." However, many view the "Trace" as freaks and outcasts due to some misusing their abilities for their own gain.
The narrative follows two central characters: Sa Kang-Gwon, a high school student who is a "Trace" but tries to conceal his powers, and Kim Yun-Seong, who gained his abilities in his early 30s. After acquiring his powers, his wife and daughter were suddenly taken away for experimental purposes.
