Harper Lodge returns to Riverdale and she's in the process of writing a new book. She only shares details of the book with her cousin Veronica, but Veronica lets it be known that the book is semi-autobiographical. When it turns out to be a romance featuring someone inspired by one of the boys from Riverdale, everybody wonders who the male love interest is based on! But the more the gang thinks they've got it figured out, the more wrong they realize they are! Who is Harper's tale about? Will the gang solve the mystery? Find out in "Writer's Blockheads"!