The anime is set in 2045, where the Internet and AI are commonplace even in space, and centers on a group of children stranded in space after a large-scale accident occurs in a space station. By using narrowband, social networking, and a drone that they can manipulate through smartphones and low-intelligence AI, they overcome many crises.
 
(Source: Anime News Network) 
Note: Also released in Japan as a 2-part film series with the same content, the first part showing in theaters simultaneously with the worldwide Netflix release.