Wonderful World

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

Soo-hyun is imprisoned for seeking revenge. She is released after seven years with a duty to fulfill.

Soo-hyun goes to find Seon-yul to fulfill Hyeong-ja's request. Will she be able to do it safely?

Soo-hyun receives a photo of her husband's affair. Meanwhile, Seon-yul decides to accept the diary.

Soo-hyun is shocked to see Su-ho enter the hotel. Meanwhile, Soo-hyun takes care of Seon-yul.

Soo-hyun senses who sent the photo, and she clashes with Seon-yul, who puts himself in danger nonstop.

Soo-hyun suspects that Seon-yul may not be Hyeong-ja's victim. She tries to unveil his identity

Soo-hyun discovers Seon-yul's true identity. Can Soo-hyun protect her family from Seon-yul's revenge?

Soo-hyun is tormented by Su-ho and Yu-ri's betrayal. But Seon-yul has no intention of stopping.

Soo-hyun tells Seon-yul that his mother is more important. Seon-yul gets a call that Eun-min is awake.

After suddenly losing Eun-min, Seon-yul finds himself alone. Soo-hyun seeks out Seon-yul, and Seon-yul expresses his genuine feelings. As Soo-hyun gathers evidence on Eun-min's case, she discovers that Su-ho knew about Gun-woo's incident. Soo-hyun questions Su-ho about why he didn't dig further into the case.

Upon learning that the culprit who killed Eun-min is Kim Jun, Seon-yul is overcome by feelings of betrayal and self-loathing. Soo-hyun is determined to uncover the truth behind Gun-woo's incident and begins to investigate step by step. Soo-hyun, Seon-yul, and Su-ho each move forward with their own plans.