No Case Should Remain Unsolved

Twelve years after Senior Inspector Jeon Gyeong retires, a young police officer visits her and pleads for her to reexamine Seowon's case. Yet with every recovered memory, one truth becomes clear: everyone close to Seowon was lying.

On February 5, 2012, a young girl named Seowon is reported missing from a playground. The police launch an investigation and question witnesses and suspects, but Seowon's case remains unsolved. Twelve years after Senior Inspector Jeon Gyeong's retirement, a young police officer visits her and pleads with her to reexamine Seowon's case. But with every recovered memory, one thing becomes clear: everyone in Seowon's vicinity was lying.