Krimi. Daisy Wells and Hazel Wong are best friends at Deepdean School for Girls, and they both have a penchant for solving mysteries. In fact, outspoken Daisy is a self-described Sherlock Holmes, and she appoints wallflower Hazel as her own personal Watson when they form their own detective agency. The only problem: They have nothing to investigate. But that changes once Hazel discovers the body of their science teacher, Miss Bell - and the body subsequently disappears.