Ilpalazzo wants one thing: to rule world so he can better it. Excel just wants to help. Too bad she sucks at her job.

Excel works for Across: an organization bent on world domination to create a better society. She ain't exactly great at her job but she definitely tries hard. And with her new partner from outer space she ain't giving up. Meanwhile 3 roommates get a job with a weird government agency, a foreign construction worker is forced to be the love slave to the embodiment of the universe (a vortex with slender womanly arms) and a man with an afro gets into all sorts of weird messes that remain unexplained. And this is only the tip of the iceberg to this hilariously twisted series!—Kai-18

It's hard to take over the world, and the enigmatic Il Palazzo, head of the ACROSS organization, knows this, so he aims to start small by conquering the city of Fukuoka. Two young officers, the Excel and her partner Hyatt, are tasked with executing this plan, but standing in their way are the City Security workers, a group consisting of three (mostly) normal guys, a very severe girl, and some robots. Regardless of simplicity, Excel and Hyatt always manage to screw up their missions, which usually result in death and lots of destruction. Heppoko Jikken Animation Excel Saga chronicles the elaborate troubles that the ACROSS officers get themselves into, as Excel and Hyatt never fail to do their jobs improperly.—MAL Rewrite