The training grounds

Charlotte had been counting down the days to a two-month break in the sun: a stay on a secluded tropical island with a wealthy, attractive companion. Her arrival turns that expectation upside down. The island is a vast correction centre called the Training Grounds, overseen by a stern and striking figure known only as the Master. Charlotte soon learns she has not been brought there as a guest but as a slave, and the shocks that follow go much further still.