Four mythical Elementals—Water, Land, Air, and Fire—have the power to save two worlds, Earth and Farworld, from a common enemy: the Dark Circle.

Marcus, a disabled boy from Earth, and Kyja, a girl with no magic from Farworld, travel with Cascade, a Water Elemental, toward Land Keep, the home of the powerful and wise Land Elementals. However, their journey may end before it even begins. Land Keep is empty, deserted for at least a thousand years, and the rumor is that the creatures who once controlled all land magic are extinct. Marcus and Kyja's only hope seems to lie in finding the Augur Well, a legendary Oracle protected by subtle traps and mind-bending trials. To succeed in their quest, Marcus and Kyja must also avoid the Keepers of the Balance, an order dedicated to redistributing magic to the rich and powerful. And they must travel far underground, where Cascade is unable to follow and where they will be unable to leap to the safety of Earth.

As the Dark Circle closes around them, Marcus and Kyja are faced with the temptation of what they desire most. Sacrifices must be made, and not everyone will survive unscathed.