There are a lot of dark secrets at Seonam Girls High School, but nothing is too difficult to solve for the school's Sherlockian group of private investigators. Mentored by their teacher Ha Yeon Joon, these beautiful and intelligent sleuths use investigatory finesse to solve hot-button cases, including abortion, bullying and suicide.

• Jin Ji-hee
• Kang Min-ah
• Lee Hye-ri
• Lee Min-ji
• Stephanie Lee
• Lee Seung-yun
• Jang Ki-yong
• Choi Deok-moon