In a suspenseful tale with hidden identities, Angelina's father, Nathan, a protective agent, hires Jeon Jeongguk as her bodyguard. Jeongguk, concealing his past as an assassin, grapples with the fear of Angelina discovering his secret. Questions arise: Will she find out? How will Jeongguk react if his hidden past is revealed? Amid danger, a mysterious kidnapper, and emotional complications, Angelina's quest for a normal life takes a surprising turn, creating a captivating story of love, secrets, and full of danger twists.