A female university student goes missing, and soon after, a victim in a hit-and-run case is discovered—believed to be the same person. As detectives search for a witness, Min Soo Ah comes forward. Though blind, Min Soo Ah is no ordinary witness—she's a former top student at the police academy, and her heightened senses help uncover crucial clues about the case.

Just as the investigation gains momentum, another witness, Kwon Ki Sub, steps forward. Unlike Min Soo Ah, he claims to have seen everything with his own eyes—but his account contradicts hers.

As the case unravels with unexpected twists, Min Soo Ah must rely on her instincts and courage to uncover the truth—before the killer comes for her next.