We all have nightmares, but most nightmares will not happen in the real world. Chomper's, however, becomes real. He has a nightmare of a yeti zombie attacking him. Sunflower calls Rose to help Chomper with his nightmare. Rose makes a portal into Chomper's dreams to find the yeti zombie. What they don't notice is when the yeti zombie finds the portal and escapes into the house, making Chomper's nightmare a reality.