The series is the second installment of the revenge trilogy by director Park Chan-hong and writer Kim Ji-woo, after Resurrection in 2005 and followed by Don't Look Back: The Legend of Orpheus in 2013.

This leads him to Seo Hae-in (Shin Min-a), a quiet librarian who has the uncanny ability to make a psychic connection to an object to discover its history.

The one common link between the suspects is their defense attorney, Oh Seung-ha (Ju Ji-hoon), a young lawyer who is seemingly kind and altruistic.

An incident in his youth 12 years ago has snowballed into a larger tragedy, and the two men involved are destined to face each other again, unsure who is good and who is evil.

[6][7] This led to the production of a Japanese remake in 2008 titled Maō, starring Satoshi Ohno, Toma Ikuta, and Ryoko Kobayashi.