In the opening titles, we learn why this movie exists: In the year 1995, Andy, the little boy from Toy Story, saw a movie. That movie was this movie, and it would become his favorite movie, which in turn would inspire his mother to buy a toy from that movie (a Buzz Lightyear doll), who would in turn ruin the life of toy cowboy named Woody.
What Lightyear posits is: Maybe Woody was right to be annoyed that this joker was taking his spot on the bed?
The setup is simple enough: During a deep-space exploration mission, Captain Buzz Lightyear (Chris Evans) diverts from the planned trip to explore a previously unknown planet. While trying to escape the planet with the aid of fellow Space Ranger Alisha Hawthorne (Uzo Aduba), Buzz crashes the ship and is forced to awaken the scientists on board...