Dominic and Grandpa Bob are off to an exciting camping trip at Point Beach State Forest, but when Dominic gets the scoop about a recent robbery at the Historic Washington House and ice cream parlor, he finds himself smack dab in the middle of it. The town of Two Rivers is headed for a serious meltdown after a ledger proving their claim to sundae fame is stolen, with a televised commemoration only a few days away. A series of odd coincidences and daring discoveries puts Dominic on the case which ultimately leads him dangerously close to finding the criminals and solving the mystery. It won't be easy with the bumbling park ranger always getting in the way, but with a little help from a strange group of hippies and the eccentric camp hosts, Dominic may just save the day. The "sundae," that is.