Fresh from pounding the streets of Tokyo in her designer boots, spy goddess Rachel Buchanan is called to yet another corner of the world. When a Mithrian artifact is pinpointed deep in the thick, sticky, dark, and "endangered" Brazilian rainforest, Rachel packs a bikini and heads for Latin America with her spy-school friends. Of course, it being the season of Carnival in Rio, the rest of the team might have a tough time dragging her away from the greatest party "ever" . . . or at least long enough to beat her archrival, Simon Blankenship, to the prize.