A birthday celebration turns into an unexpected rescue mission in this riveting Bindi tale After a croc research trip in the Top End of Australia, the Irwins decide to travel on to East Arnhem Land, to a tiny town on the western shores of the Gulf of Carpentaria. They plan to help celebrate the 13th birthday of their friend Charlie, who is the son of one of the indigenous sea rangers working in the area. When they discover a huge ghost net with a dolphin trapped in it on the beach, Bindi and her friends scramble to save the trapped animal.