Mac fixes up Anna's gash on her leg from the zombie with left-over Spider-man Band-aids and hand sanitizer to help clean the wound. Anna gets wary on whether or not she'll turn into a zombie or not. Luckily, Mac reassures her by saying "No way, if anything, you'll get superpowers from these Spider-man Band-aids. Mac wants to talk to Dennis about Anna's wound but figures he better wait until he's alone with Dennis so he doesn't worry Anna or Jeremiah.
Mac wakes wakes hours later to a strange rustling sound. That's when he notices that Anna was gone. Mac wanted to ask Dennis to help him find her but, didn't want to leave Jeremiah alone, neither did he want to bring Jeremiah into harms way. Mac decided to follow the mangled footprints, most likely Anna's, to try and find her. Later, Dennis wakes up to see that Mac is gone. Dennis follows the footprints of Mac and an unknown person's footprints/ drag marks.
Mac takes Jeremiah with him to follow the footprints and figure out where Mac and Anna are. Dennis and Jeremiah hurried to the truck and drove along the tracks. They followed the tracks all the way to the lake, where Anna had a firm hand around Mac's neck.