In the gritty and fast-paced world of Seoul in the 1970s, two childhood friends find themselves navigating the dangerous underworld of Gangnam. As they rise through the ranks of power and corruption, their bond is tested by betrayal, greed, and the allure of easy money. Set against the backdrop of rapid urban development and political turmoil, "Gangnam Blues" weaves a tale of ambition, loyalty, and the high price of ambition in a city on the brink of change. With thrilling action sequences, complex characters, and unexpected twists, this gripping crime drama explores the dark side of ambition and the choices we make in pursuit of our dreams. As the stakes get higher and the dangers escalate, the two friends must decide where their loyalties truly lie and what sacrifices they are willing to make to survive in a world where power comes at a steep price.