Sebastian and his family live in Central New Ireland, Papua New Guinea. Not far from Sebastian's home are huge mysterious caves, the Maliau Caves; an underground land, lost in time, known only by clan elders and through the retelling of stories and legends from local villagers. Maliau is a Pidgin word for eel. The caves were also known by the villagers as 'The Bat Caves'. One day while exploring in the jungle Sebastian discovers a sinkhole which leads to the entrance of a cave. It contains incredible formations and ancient engravings. While standing near the stream that runs through the cave, a gigantic shadow slowly swims towards him... a spirit eel... a Maliau!
Sebastian excitedly runs home and then returns to the cave's entrance with his brother Ashton. Their young sister Khloe sees them going but is unable to follow. The boys enter the cave together and make some exciting as well as frightening discoveries only to become trapped and lost in the cave system. Their brave young sister Khloe, accompanied by her friends Silitia and Sipondia and villagers Matagol and Benson play their own part in finding and rescuing the boys. The Maliau Caves Adventure is an exciting story of mystery, courage, survival, friendship and rescue.