Red Killifish was a mystery novel written by Keigo Higashino, which was also adapted into a Japanese TV series. The drama mainly told the story of a young detective who worked together with an older detective to investigate a murder case. They finally uncovered the truth of the murder case by tracing clues and solving the mystery. The plot and the characters were excellent. The plot was compact, the characters were vivid, and the plot was flexible. At the same time, the details of the music, photography, and costume design were also handled very well, bringing a good viewing experience to the audience. However, the performance of the drama's reasoning plot was relatively weak. Sometimes, the plot development was too jumping, making it difficult for the audience to understand. In addition, there were some problems with the character's personality. For example, some of the characters were too flat and lacked depth and three-dimensional. In general, Red Killifish is an excellent Japanese TV series. Although it has some shortcomings, its performance in the plot and character description is still worthy of our praise.