The story begins as the toys prepare for Andy’s birthday celebrations, but their peace is disrupted by the arrival of a new gift: Buzz Lightyear, a modern Space Ranger equipped with advanced technology. Convinced he is a real intergalactic hero, Buzz quickly wins over Andy and the other toys, leaving Woody feeling overshadowed and fearful of being replaced. This tension escalates dramatically when Woody and Buzz accidentally tumble out of the window, embarking on a perilous adventure far from home.