The great phantom thief of the century becomes a child and ends up part of a police family!? Phantom Thief Lapin slips through police dragnets to steal expensive jewels. It was supposed to be easy as always. However, that day, immediately after stealing a jewel, he was shot by someone, and when he came to, he had become a child—! And unfortunately, the ones who took in the now-child Lapin were the very police family that had always been chasing him! He can't escape from this family of quirky characters!? If his identity is discovered, he'll be arrested immediately! A thrilling phantom thief action story begins!