From the back of the book:
Adventure of inSANe "Villa Diodati"
This is a mansion where fear gathers
Will you be experiencing fear? Or will you be a narrator of the grotesque?
Oumagabito who get involved with the grotesque while each of them holds their own concealed truth - this book contains many incidents they get involved with.
The first scenario collection for "multigenre horror RPG inSANe" containing altogether more than 20 scenarios, consisting in addition to scenarios that have been published in "Role&Role" like for instance "Kisaragi Station" where they stray into a weird station, or "Shadowfires" where they get entangled in the strange concerning fire, and 10 newly written scenarios like "Crusader for Prohibition" set in a hidden bar, or "Camp inferno" which brings the encounter with a murder incident at a camp site, there are also scenarios that are popular on the net.