Join Emily and Pegasus one last time, in this epic conclusion to the Pegasus series! After the events in Hawaii, Emily is struggling to adjust. With the blessing of Jupiter and the elder Olympians, Emily decides she must return to Earth one last time, to fulfil a promise made long ago ... But when she arrives, she is horrified to find that the CRU have taken more victims. Emily has no choice but to expose herself, Pegasus, Joel and their close Olympian friends including Lorin, to the biggest danger they've ever faced, as they delve deeper into the CRU and make an astonishing discovery about its origins. A discovery that means Emily will be forced to return to Titus to face Saturn, before an unstoppable force of evil is unleashed on the unsuspecting worlds.