This is the second tail-biting adventure about the Spy Mice. Roquefort Dupont, leader of the rat underworld is seeking revenge. He's gathering rat leaders from all over the world (including Stilton Piccadilly from London) to a meeting in New York. Glory and Bunsen, intrepid field mice agents, set out for the Big Apple to foil Dupont's plans for world domination. But Glory is kidnapped and held hostage - can Bunsen turn into Action Mouse and save her?