The campus of Yukihime High School was alive with excitement and activity as the festival unfolded. Among the myriad of attractions, the Mysterious Detective Book Club's scavenger hunt stood out, drawing a curious crowd. One of the most eager participants was Megan Darktower, who had graduated from Yukihime the previous year. Now a university student at Bluecorn State University, Megan had returned to support her younger sister Vivian, the student council president, and to reconnect with her old school. Alongside her were three friends from university: Lily, Emma, and Sophie. They were excited about the challenge and intrigued by the mystery that awaited them.