The movie focuses on the the graduation of the the previous General Manager Takahashi Minami and now Yokoyama Yui taking over. Furthermore, the sister groups HKT48 and NMB48 are gaining popularity. Also NGT48 make their debut and the rival group Nogizaka46 become a bigger and more threatening rival.
Natsumi Yukihira (Ryoko Shinohara) receives secret documents of an organization that controls the country from the shadows. Because of this, Natsumi's ex-husband, Kazuo Sato (Teruyuki Kagawa) pays a terrible price. Natsumi goes back to the Investigation #1 of Tokyo Metropolitan Police Department to take on the organization, but Natsumi becomes involved in a new case. She gets closer to the final enemy.
Young women disappear one after another in drizzling rain. They all hear the “cursed song” of the Cage Song before they vanish into thin air. Kitaro and his friends investigate these mysterious cases when they meet Kaede Hiramoto, a high school girl who finds herself involved in this mystery. With the help from the librarian of Yokai Library, they find out that the curse was caused by an evil Yokai that was released from 1,000 years of sealing. To save Kaede, they are to gather the 5 ancient musical instruments and perform the ritual to seal the evil Yokai again, which has to be done within 48 hours!
When a devoted detective probes the suspicious death of her father, she uncovers massive corruption and finds herself in grave danger.
The movie takes place again in the fictional Wangan Station of the Tokyo Metropolitan Police Department the once empty space within Wangan's jurisdiction has become a popular tourist attraction. When a string of murders of company execs begins taking place, Aoshima jumps at the opportunity to pursue something other than his current case, which he finds less than inspiring. However the powers that be have other ideas, and Wangan again plays host to a special investigation team from headquarters. Aoshima's friend Superintendent Shinji Muroi, assigned by headquarters to assist Okita, is again powerless to help the local officers as decisions are made by the higher ups.