There will come a day when Krypto stands beside Superman, helping him fight off monsters, aliens, and supervillains—a day when this dog will save his adoptive world thanks to the incredible powers granted him by Earth's strange yellow sun. But he's not there yet. Today, Krypto is a normal puppy on Krypton, spending each happy, snoozy, endless day alongside his family: Jor-El, Lara, and baby Kal-El. But when a rocket test goes wrong, Krypto finds himself lost in space—and soon crash-landing, all alone, on a strange and alien world called "Earth."