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On Christmas Eve, Komugi shares a joyful meal with her father, Haruo. Later, she returns home to find her house engulfed in flames and Haruo dead.

Magazine reporter Kamii approaches Komugi with a provocative offer: information about her father's secret past if she helps with his article.

From a DNA test report, Komugi learns she might not be related to someone in her family. Meanwhile, the police keep tabs on the owner of a food stall.

While lawyer Matsukaze gets a tip from Kamii that alters his investigation of Haruo's murder, food stall owner Someda reveals his past to Komugi.

When tragedy derails her investigation, Komugi tracks down a lawyer from the Higashikayama case with Matsukaze. Prosecutor Anan rushes to charge Tomoya.

Before another lawyer offers help to Komugi, Anan questions her directly. Elsewhere, detective Akazawa learns that Kamii knows details about his past.

After Kamii shares photos of her birth records from her Maternal and Child Health Handbook, Komugi realizes two names are also in her father's letter.

After the latest fire, Matsukaze takes a surprising trip when he suspects Akazawa's involvement. Kamii shares a key lead he uncovers with Tomoya.

As Komugi pursues the final name in Haruo's letter, Anan settles a personal score. Later, stunning revelations emerge from a past indictment.

When the heartbreaking truth about the Togayama case gets revealed, Komugi finally answers the burning questions about her past and her father's death.