Conan and his friends take a well-deserved break at a video arcade - until one unlucky gamer is found dead in the seat of a virtual-reality game. As Conan and Rachel investigate, they're joined by an unlikely new accomplice: Rachel's English teacher, Ms. Saintemillion. Outside the classroom, the fast-talking American turns out to have an itchy trigger finger - at least when it comes to video games - and a suspiciously keen interest in Conan. Has the shrunken sleuth stumbled upon a valuable new ally...or an enemy agent?