An extraterrestrial from planet Irk has come to destroy planet Earth. Yeah. Right. No one else believes Zim either, even though he's green. The only one who knows the truth is Dib, a paranormal investigator. Dib is on to Zim’s evil plan to wipe out the human race. Luckily, Zim’s schemes are always foiled by his own idiocy and by GIR, Zim’s malfunctioning robot servant.