Sue was born into a bleak future, where the military keeps tight control over the few children born with psychic abilities known as clovers. The clovers are forcibly tattooed with a symbol that indicates their potential power, and Sue is the only four-leaf clover in the world. Kept locked away in isolation her whole life, Sue longs to escape and get a taste of normal life. A voice in her mind guides her to the answer: an agent named Kazuhiko. Neither of them realise it, but Sue and Kazuhiko share a bond that spans decades...