The story of Diamond City takes place in the South African diamond fields during the latter half of the 19th Century and indeed much of the filming took place on the actual land where the events actually took place. Stafford Parker (David Farrar) is a self appointed peace-keeper in Hopetown, nearest settlement to the diamond fields. It is 1870, and when news spreads of a big find Stafford Parker hurries off to see the old chief, in whose land the find was made. Stafford asks the old chief (Norris Smith) to grant him the concession to work the new diamond fields as the sole agent. Whilst they are talking, the old man's nephew arrives with a counter proposal from his employer, the unscrupulous rum-dealer and illicit diamond buyer, Muller (Niall McGinnis). Stafford gets the concession but has to convince Muller to accept his authority in a fist fight. Muller appears to agree to Stafford registering the claims and administering the town, however he continues to plot and scheme.