The plot concerns on a young boy named Willy, who after the destruction of his ship, gets separated from his parents and lands on an unexplored planet, where he must survive until the arrival of a rescue mission.

Terra Willy is the second feature film from the Toulouse-based studio TAT Productions to be released in theatres,[clarification needed] after The Jungle Bunch.

Shortly after his previous film release in July 2017, TAT announced its production of Astro Kid with a team of 70 people and having a budget of €6 million.

"[8] Leslie Felperin of The Guardian give a rate of the film three stars out of five, saying that the animation is "fluent and densely rendered, although sometimes the characters have less subtlety than their surrounding environment.

He also noted that the film is "meant to teach kids about self-reliance, cooperation, the value of outdoor adventure and risk-taking; and the obligatory environmental sentimentalism is also present and correct.