With the Gyaos re-emerging, Gamera's ties to humanity have been severed with his bond to Asagi broken. Nagamine and Asagi investigate while an orphaned girl named Ayana discovers a new creature she names Iris. Nagamine and Asagi must reach Ayana before she takes her revenge on Gamera, who she blames for the death of her family.
Hajime Kindaichi is working a part time job as an assistant to a TV station for the filming of a shock show. They have invited celebrities in Segori Village and are planning to scare them by playing pranks on them such as fake deaths. However, a threatening letter arrives and soon, a real murder occurs broadcasted in front of everyone.
