Cho Woo-j

Former intelligence agency agent Min Ki-heon (played by Gong Yoo), who is on the verge of death, happens to meet Seo Bok (played by Park Bo-gum), the "immortal" who holds the secret to human immortality. Min Ki-heon's last mission is to protect Seo Bok to a safe place at all costs. Along the way, a huge financial group and various evil forces that want to possess the immortal launch a large-scale hunt