Invader ZIM: Enter the Florpus is an animated movie that follows the adventures of ZIM, an alien invader who has been sent to Earth to conquer it on behalf of his home planet. ZIM's mission on Earth is to find a way to destroy the planet and prove himself to his leaders back home.
However, things start to go wrong for ZIM when he discovers that his leaders never had any intention of coming to Earth in the first place. This realization shakes ZIM's confidence to the core, and he starts to doubt his own abilities as an invader.
Meanwhile, ZIM's human nemesis, Dib, sees this as the perfect opportunity to finally defeat the alien invader once and for all. Dib has been obsessed with proving the existence of aliens and exposing ZIM as an alien invader for years, and he sees ZIM's moment of weakness as the perfect chance to strike.
As ZIM spirals into self-doubt, Dib begins to uncover the secrets of ZIM's plans, and he sets in motion a series of events that could spell disaster for the entire planet. Against all odds, ZIM must find a way to regain his confidence and save his home planet from destruction, all while fending off his arch-nemesis Dib.