The evil neighbour, Donald Lawton, has decided to blow his secret dam, after Reggie Mannister has spotted it from an aircraft.

After their water bore dries up – sabotaged by the neighbouring villain – Dick, Marion and Reggie take the cattle to the last water left on the Hastings property.

Marion (Margaret Dare) fumes with indignation about being told she’s useless by Dick Drake, her father’s overseer (Victor Jory).