Ben and Lucy: The Sunken Kingdom

What powers do twins share and can those powers be unleashed in a far off land to save an Empress? The twins Ben and Lucy get swept away to a distant land filled with dragons, witches, giant serpents and talking animals. How can these two kids use new found magic and the connection they share to fight off flying monsters and save a palace under the lake? The magical land of Zhunanium will come alive for the two heroes and what is so special about backpacks anyway?