Soo-hyun tragically loses her son in an accident. When the perpetrator is granted leniency, she seeks revenge.

Soo-hyun is imprisoned for pursuing revenge. She is released after seven years with a task to complete.

After her release, Soo-hyun tries to search for Hyeongja's victim to grant her last wish. Her quest takes her into the rough world of a junkyard, where she meets Seon-yul.

Soo-hyun receives an illicit photo of Suho; Seon-yul pursues Soo-hyun to obtain Hyeongja's diary, but gets in an unexpected fight; Soo-hyun's heart aches for Seon-yul, and she decides to volunteer as his protector.

As the aftermath of the photo unfolds, Soo-hyun wonders who sent it; after realising how sincere Soo-hyun is, Seon-yul begins to confide in her.

Soo-hyun investigates Eun-min's case further after discovering who sent her the picture; Seon-yul starts to feel uneasy with Soohyun's caring actions.