It's time for the annual science fair. This year that kids at Rebus Elementary will be completing against the students of Piggot Academy. The prize is a trip to the American Museum of Natural History in New York! The members of the Abracadabra Club are dead-set on winning, but someone keeps sabotaging their projects. Who's to blame? Annoying Bug Jones? The kids from Piggot? Luckily the club cracks the case and learns that their science teacher's son is trying to make Rebus lose the competition so his dad won't get a big new job in Boston. In the end, Rebus wins-and their teacher stays.