Storyline:
A case involving the hidden truth behind the law prohibiting double jeopardy.
When Choi Do-Hyun (Lee Joon-Ho) was a boy, he had a heart disease. He spent most of his childhood in a hospital. He miraculously had a chance for a heart transplant. Right after the successful heart transplant surgery, his father was accused of murder. His father received the death penalty.
To investigate his father's case, Choi Do-Hyun now works as a lawyer.