シーズン1・Jiro Azuma is no average high schooler. A descendant of ninjas and trained in the ancient warrior art of the shinobi, Jiro is also able to talk with animals. After a mysterious encounter with an injured cat named Rago, Jiro discovers the feline is actually the legendary Black Star of Doom! Joined by the Bureau of Espionage, they fight off swarms of mononoke lying in wait to exploit Rago's powers.

シーズン6・ＭＩ5（英国情報局保安部）の落ちこぼれエージェントたちと、彼らを率いる傲慢で悪名高いチームリーダーのジャクソン･ラム。スパイの世界の策略をかいくぐり、危険分子から英国を守る彼らの姿を、ダークなユーモアを効かせて軽快に描くドラマ。