A police detective who loses everything to a criminal organization seeks payback when he gains special abilities through biotechnology.

Story follows a group of physical therapists, nurses, radiological technologists and trainees. Ye Jae-Wook works as a physical therapist and also teaches in the same field. He begins to work as a team leader at a hospital. Woo Bo-Young has been working as a physical therapist for 3 years. She wanted to become a poet, but due to her poor family background she studied to become a physical therapist. Shin Min-Ho is a trainee, but he isn't interested in physical therapy. His grades weren't good enough for medical school and his parents, who are both doctors, made him study physical therapy.

Noh Ji Wook is a prosecutor in the Central District Prosecutors’ Office who ends up switching professions to a private attorney. He harbors a trauma stemming from an event in his childhood involving his parents and his first love. Eun Bong Hee, a Taekwondo athlete in her youth, is a prosecutor trainee who has become a murder suspect. Eun Bong Hee and Noh Ji Wook both find themselves being the focus of a killer.