魔隣組は夏休みを利用してキャンプ場で合宿をしようと決めたが、いかんせん、決めた時期が遅かった。どこのキャンプ場も夏休みが終わるまで満杯で、予約が取れない。タカシたちが困っていることを知ったシャーロックおじさんは「良いキャンプ場を紹介してやろう」と約束。その言葉通り、キャンプ場は見つかったのだが……。
Marin Gumi decided to have a camping trip during summer vacation, but it was too late to do so. All the campsites were full until the end of summer and they couldn't get any reservations. When Uncle Sherlock found out that Takashi and his friends were in trouble, he promised to introduce them to a good campsite. As he said, they found a campsite, but .......
