Decades after a violent war annihilated much of the world, Kaspar has grown up in a society based entirely on peace. Weapons are now illegal, and an elite peacekeeping force called the Guardians ensure this new harmony is maintained. But beyond the boundaries of Kaspar's city, a vicious band of rebels are gathering strength. It is up to the Guardians to protect the city from the rebels' attempts to destroy the peace, without ever resorting to the brutal methods of their enemy. Shortly after Kaspar graduates as a Guardian, he encounters a rebel for the first time - a beautiful girl named Rhea. When Kaspar begins to be haunted by strange visions and memories - memories that belong to Rhea - he realises he hasn't been told the whole truth about what the rebels really want - and what it is he's really fighting for.