A superhero drama about Soo-yeol who has lived his whole life as a materialistic police detective, but changes into a champion for justice and fights against police corruption when a hidden persona called "K" awakens inside him.

• Lee Dong-wook
• Wi Ha-jun
• Han Ji-eun
• Cha Hak-yeon
• Kang Ae-sim
• Kim Dae-gon
• Cha Si-won
• Lee Sang-hong