This is the first in a brand-new series of murder mysteries. ''Miss Marple'' for the younger reader! When eleven-year-old Poppy Fields goes on an activity holiday to a remote Scottish island, she is looking forward to a week of climbing, hill-walking and horse riding. But things take a bad turn when their instructor has what appears to be a fatal abseiling accident. When Poppy discovers that his rope was cut, and more of the instructors start to have 'accidents', she suspects foul play and decides to investigate.