Skipper Matthews has an awesome comic book collection of which his favorite is 'The Masked Mutant'. Skipper can't get enough of the Mutant until one day, he gets lost in a strange part of the town and finds a building that looks exactly like the Mutant's secret headquarters, a building that appears and disappears. Has Skipper read one too many comic books, or does the Masked Mutant really live in Riverview falls?