Story Set Before a Current Work
Puzzle 12 of Celebrity Chefs Medium Pack
Question is: Story Set Before a Current Work
and the answer is: PREQUEL
Word Meaning:
PREQUEL — (narratology) In a series of works, an installment that is set chronologically before its predecessor, especially the original narrative or (perhaps improper usage) any narrative work with at least one sequel.
Definitions from Wiktionary.