Mum and Day Hayseed are visited by an archaeologist fresh from university, Owen Osborne, looking for signs of prehistoric people in nearby caves.
They go through a cave and discover a secret valley which is home to a lost tribe, who have never been in contact with the outside world, wear skins for clothing, and are surrounded by diamonds.
[2] Popular stage star Hector St Clair, who had arrived in Australia from England in 1921 and decided to stay, made his feature debut in the lead.
[7] Smith experienced a notable lack of co-operation from officials making this film, being barred from shooting at Randwick racecourse and Sydney Town Hall.
"[10] Everyones wrote "Beaumont Smith, even if he has not yet attained greatness in his efforts, is much to be commended for giving us a-sequence of very humorous periods in the life of the Hayseeds.