Ryder was unable to catch the mutant zombie that bit him due to his lack of energy. Consequently, he became unconscious from the bite, but his immunity prevented him from turning into a zombie. The little zombie that bit him had evolved and gained the ability to talk and think rationally, thanks to Ryder's blood. With her newfound abilities, she took care of Ryder by giving him water and placing a wet towel on his forehead. However, as a nine-year-old child, she was unable to do much else to assist Ryder, as she didn't know how to cook, check his temperature, or dress his wounds.
After a day, Ryder woke up and immediately swung his fist at the little zombie sitting right next to him