Set in a dystopian steampunk world based on the concepts and visuals of comic artist Jacques Tardi, the plot concerns a young scientist continuing her great grandfather's research and attempting to find her family, who have disappeared.

[5][6][7] The film takes place in a world where Napoleon III was killed in a building explosion and the Franco-Prussian War was averted by his son's shrewd diplomacy.

Over the next 70 years, the world's scientists disappear one by one, causing technological progress to grind to a halt and pollution to spiral out of control.

April discovers that her parents perfected the serum years ago and hid the results inside her snowglobe.

The authorities take Pops to a government weapons research center in Fort-la-Latte, where he finds other scientists studying a mysterious machine found at the bottom of the sea.

At the rocket's launch, Julius secretly switches April's serum with plain water before handing it to Rodrigue.

Rodrigue drinks the "serum" and reveals he has rigged the rocket to explode, wiping out humanity so he can take over the world.

The site's critical consensus reads, "Bursting with a colorful imagination befitting its promise-packed title, April and the Extraordinary World offers spectacular delights for animation fans willing to venture off the beaten path.

"[15] Metacritic, which uses a weighted average, assigned the film a score of 85 out of 100, based on 17 critics, indicating "universal acclaim".