Surrounded by natural scenery, Onikiri Village is undergoing a thrilling transformation. The president of a local large company, Gohei Horibe, was killed by a black bear in the wild. His nephew Daikichi (played by Tetsuya Chiba), who is the vice president, immediately took over and insisted on selling the back mountain, which is very important to many people, to others. Daikichi's younger brother Otoya (played by Tatsuya Fujiwara), although he is a special manager, is naughty and has no interest in the business world. In addition, due to their different personalities, he has always been at odds with Daikichi. Many people, including Otoya and the director of the local folklore museum, Kyosuke Tenma (played by Koji Ishizaka), opposed this decision, but Daikichi was stubborn and refused to give in. This move made Otoya extremely dissatisfied, so he carefully planned a perfect murder with a strong alibi. A new combination of Furuhata Jinsaburo (played by Tamura Masakazu), Imaizumi Shintaro (played by Nishimura Masahiko) and Saionji appears to face the perfect murder case sent by Otona... This film is the first part of the New Year's finale.