ZIM's latest doomsday plot is foiled when GIR goes haywire and tries to kill everyone in sight (But especially ZIM. He kinda deserves it.) Diagnostics reveal that the malfunction is due to a virus, forcing ZIM to do the one thing he never thought he'd have to--GO INSIDE GIR'S BRAIN. Where nothing works and everything is exactly at GIR's level of nonsense. And when ZIM discovers that the virus was created and implanted by a being known only as VIROOZ...