The definitive origin story of Buzz Lightyear, the hero who inspired the toy, Lightyear follows the legendary Space Ranger after he is marooned on a hostile planet 4.2 million light-years from Earth alongside his commander and their crew. As Buzz tries to find a way back home through space and time, he is joined by a group of ambitious recruits and his charming robot companion cat, Sox. Complicating matters and threatening the mission is the arrival of Zurg, an imposing presence with an army of ruthless robots and a mysterious agenda.