With their city lost and the darkness growing ever stronger, the people of Mirra begin to fear that they may be fighting a losing battle. The guardians refuse to give up, but can they take back the city and restore the power to the lights? In the end, it may be up to the dark prince to decide the fate of Mirra, but they must first find out what he wants from the lights in return. In this final book, light will face off against darkness and the victor will be decided by some children who are out of their world and out of their depth.