本作品的舞台是孤岛学园,那里聚集了很多惹麻烦的学生。作为转校生来到那所学院的穗村伊月,加入了法国残酷戏剧《grandguinille》的研究会。研究会的成员加上管理他们的教师和厨师长、神秘的新任教师等,聚集在学园的人们总觉得有些可疑。终于发生了像grangynoille一样的连环杀人事件,对死亡的恐惧,以及男人之间的爱与恨的旋涡将他们卷入其中。
Phoebe and fellow American Julian Peters meet in Rome, find a lost dog, and agree to return it to Monte Carlo to split the five thousand dollar reward. Discovering the dog's owner dead, they panic and become fugitives. Other victims of misfortune also become suspects, as the plot twists and luck and judgment desert everyone.