Seven chosen ones. Their mission is to uncover the greatest mystery in history. They come from different eras. And they don't know anything about each other. Some were chosen by the gods for a great cause, others ended up here by mistake. A journey awaits them that will allow them to go beyond their fantasies. But first, Briseis, the youngest of them, will face a real nightmare - the Eternal Citadel - the greatest master of illusions, where creatures live who can penetrate reality from dreams. When the hourglass turns and time ladders take the heroes to other eras, Briseis will have to believe in legends in order to survive. But how to defeat the elusive dark forces that have sworn to destroy it?