When the class pet bites the finger of Penelope, a tyrannosaurus rex, she finally understands why she should not eat her classmates, no matter how tasty they are.
Everything goes wrong for eleven-year-old Artie on his first day at Ardmore Middle School, from the moment his alarm goes off until the next morning, when everything is repeated exactly the same way.
After trying and failing to break her years-long curse of bad first days of school, eighth grader Vivian Lantz wishes for a do-over--and gets stuck reliving this year's horrible first day over and over again.