In the Childrens Film Foundation's endeavour to conquer the world they arrived in Sydney to provide an exotic background for their shenanigans in Eastman Colour
The usual CFF tropes are present and correct with the heroes' noble ambition this time being the building of a clubhouse for lifesavers (with improving advice on administering artificial respiration and the need to lock up at night).
As usual its the girls who supply the diplomacy and the boys the brawn. Naturally there's a gang of moutbreathing louts who rough up our heroes to a dramatic musical accompaniment by Edwin Astley and engage in a little sabotage (with all that water about no prizes for guessing where they're going to end up).