The drama focuses on the brotherhood between special security officer Kim Seung-woo and top star Yeo Un-gwang. Park Hae-jin plays a special security officer who is only known to a few superiors in the national security department. He always has a poker face. His new mission is to serve as the guard of the Korean star Yeo Un-gwang. The heroine is a die-hard fan of Yeo Un-gwang. Later, she entered Yeo Un-gwang's agency and became his agent. She wholeheartedly protected her idol, but the arrival of the mysterious bodyguard Seung-woo broke her original perfect life...