Bruno and his family leave their home because of his father's promotion in the Nazi Army.
A lonely Bruno meets Shmuel a Jewish boy who lives at what Bruno thinks is a farm(It's really a concentration camp). He doesn't know if they can be friends though since he's Jewish and his family says that Jews are bad.
Bruno decides to be friends with Shmuel and tries to make up for abandoning him by going into the camp and dressing like Shmuel to help him to find his father.
While looking for Shmuel's father they end up getting pushed into a group and then into a room while being told that they are going to take a "shower" ( they are really about to be gassed)
When they enter the shower they're not sure what's going on. They hold hands as the gas fills the room and they die.
Bruno's father, mother, and sister have searching for Bruno. When his father gets to the chamber and when his mother reaches the fence they all realize that Bruno has been killed.