High school student Zion, while trying to save a kitten, is hit by a truck and transported to a parallel world. His soul enters the body of someone with the same name.
In the parallel world, Zion had died at home due to a prolonged lack of water and food. This parallel Earth's name is Tera, which was attacked by a virus carried by a meteorite a week ago, turning it into a zombie apocalypse.
The transported Zion unexpectedly gains the ability to replicate food, which allows him to survive. However, various accidents lead him to encounter different survivor groups, resulting in numerous stories.
Ultimately, with the help of his companions, Zion succeeds in saving humanity.