Enjoyable triptych of stories set across C19th, 1990s and into a dystopian climate changed future in which the protagonists of each era dedicate themselves to saving a species of early wild horses. For the most part it's a thrilling yarn but then goes nowhere. The characters are unsympathetic & underdeveloped, saving the horses appears to be drudgery and problematic & ultimately a bit hopeless in the face of climate change when indeed just surviving without too much assistance is the goal.