When Emperor Lee Hwan of a forgotten imperial era in Korea is thrown from his horse during a violent storm, he expects death. Instead, he wakes up in modern-day 2026. Stranded in a world of glowing screens, strange customs, and no concept of hierarchy, Hwan—cold, disciplined, and raised to rule through fear and duty—finds himself in the apartment of Min-jae, a 24-year-old art student who just stepped out of the shower and did not expect to find an armed historical figure standing in his living room. Forced into an uneasy coexistence, the emperor and the student clash over everything: order vs. chaos, authority vs. independence, tradition vs. modern life. But as the days pass, their initial distrust begins to shift into something neither of them knows how to name. Unbeknownst to them, Hwan’s arrival in 2026 is not an accident—but the beginning of something far older, and far more dangerous, than either of their worlds.