The Black-Haired Mercenary Who Went West

21st-century veteran mercenary Jo Yu-gang wakes up in the Wild West—as a Korean slave?! While traveling through the American West to honor the final wish of his deceased comrade, Eric, Yu-gang experiences an unbelievable phenomenon: he wakes up possessing the body of Lee Mak-san, a Korean man being sold into slavery in the 19th century. Trapped in a turbulent era brewing with the tension of slavery and the impending Civil War, he finds himself surrounded by ruthless bounty hunters, gold-crazed prospectors, and hardened cowboys. Can the 21st-century mercenary survive the brutal Wild West in the body of Lee Mak-san?