For weeks, fish have been disappearing from the Primordial Lake. While the adults argue over who is responsible, three children decide to take action. They discover that the fish have left for the Northern Lands, a no-go zone said to be full of bloodthirsty monsters. And so begins a wonderful odyssey for these three brave friends. From one encounter to the next, the kids uncover their tribes’ unfounded beliefs to finally solve this great mystery and build a new way of living together.