The same evening Josh Underhill went missing, the black horse appeared on the hill above the house.Thirteen-year-old Ella knows that words are powerful. So she should have known better than to utter a wish and a curse on the same day, even in jest.??When the boy she has cursed goes missing, in the same sudden, unexplained way as her father several years earlier, Ella discovers that her family is living in the shadow of a vengeful kelpie, a black horse-like creature.With the help of her beloved pony Magpie, can Ella break the curse of the kelpie and save not just her family, but the whole community?