Matt the rat lives with his eight-year-old owner, Ryan and his parents. What his parents doesn't know is that Ryan secretly takes his pet rat, Matt to school with him - keeping him "safe" in his schoolbag. What will happen to Matt the rat when nasty girl, Lily yanks Ryan's schoolbag off of him during lunchtime in the packed dining hall one day? Will Matt the rat ever be found after being sent flying? Or will he get stood on and squashed by all of the other schoolchildren from the other classes? Will Ryan's best buddy, Ben be of any help during the search for Matt the missing rat?