In 2029, a catastrophic event resulted in a massive sinkage in the Mediterranean Sea, causing the sudden disappearance of crucial chemical elements like oxygen, carbon, gold, molybdenum, and cobalt from Earth's crust. Over the next sixty years, the human population dwindled by a staggering 90%. Scientists made a startling discovery that these missing elements had been inexplicably transported to a parallel dimension known as 'Nega Earth'. In a desperate bid to rescue their planet, a specialized group dubbed the 'Element Hunters' is formed. Comprised entirely of youngsters under 13 years old, their youthful and adaptable minds are essential for navigating the mysterious realm of 'Nega Earth' and retrieving the vital elements to restore balance to their world.