"The fair has come to Mysterious Valley! Creepella is looking to forward to a fun, thrilling day of rides and games with her family and friends. But one spooky rollercoaster seems to be making everyone who rides it disappear! Creepella is determined to get to the bottom of the mystery -- but what will happen when she rides the coaster herself?" -- summary from amazon.com

Based on an original idea by Elisabetta Dami.