On June 17, 1815, the Duke of Wellington amassed his troops at Hougoumont, an ancient farmstead not far from Waterloo. The next day, the French attacked, sparking a brutal, day-long skirmish that left 6,000 men either dead or wounded. William is a white rabbit living at Hougoumont today. Under the tutelage of his mysterious and wise grandmother Old Lavender, William attunes himself to the echoes and ghosts of the battle. Through a series of adventures, he comes to recognize how deeply what happened at Waterloo 200 years before continues to reverberate.