Edward Horniman has unexpectedly inherited an estate of 15,000 acres (6000 hectares) and the title of Duke of Halstead at the reading of the last will and testament of his deceased father. He learns that the land has become part of a weed-growing empire run by Susie Glass. He must navigate a world of eclectic and dangerous characters with nefarious agendas, whilst also trying to protect his home and stay alive.