Both drama typically fackles abour spies and how family can become an agent's weakness. They try to protect but sometimes hurting them in the process

Extraordinary event happened when they acquired their extraordinary talent.

Officer Choi Moo Gak lost his younger sister to a barcode-murder case and lost his ability to taste, smell, and feel pain. He then meets a girl named Oh Cho Rim, who is the only witness to the murder case and possesses a special sixth sense, which is the ability to see smells.