In a dark period in humanity's past, when the sun has burnt itself out, seven children are tasked with saving the future of humanity. Because of advancements made by the Sun's Last Hope organization, humanity has found refuge on eight new worlds. Life is hard on these new human colonies because the Men in Black Organization (MIBO) keeps the sun down. To survive, people must now make their own light and heat. Archer, Aquill, Elmira, Zandra, Jacy, Destin, Cara, Willow, and Nikko-Willow's younger brother-represent humanity's last hope. They must find a way to destroy MIBO before it destroys them. Too soon, the children are off on an impossible mission to stop MIBO's plans to unleash the sun plague on humanity's struggling new home worlds. Each of the children must overcome challenges, fears, and insecurities before their enemies exploit these weaknesses. And each must find the courage to face the unknown things that lurk in the dark, in the shadows on an abandoned planet known as Earth. Can humanity pin its last hope for survival on the brave, young adventurers?