They are both similar on terms of false accusation theme. The female lead in Yakusoku wants to know if her father was falsely charged of murdering a girl. While in Kujaku no Dance, the daughter wants to know if the suspect of murdering her father was falsely charged too. Both dramas involve the guessing of who is the true killer.
Yamashita Komugi is a university student who has lived with her father, a former police officer, ever since her mother died. On Christmas Eve, Komugi's father was murdered, and a letter containing the word "false accusation" was left behind. Using the clue, a man was arrested. However, Komugi later discovers that the man arrested for her father's murder is the only son of the man her father arrested 22 years ago for the murder of a family. Together with lawyer Matsukaze Yoshiteru, Komugi investigates two incidents from the present and past that seem to be related.
