The Smith kids -- Beth, Leo and Teasdale -- arrived at the Hidden Valley Hotel just at sunset. It was a breathtaking sight! The big old white building with a balcony overlooking the lake was set in the middle of the quiet New Hampshire mountains, with nothing else in sight. — But suddenly in the middle of the night they are shaken from their sleep by loud piercing screams, echoing through the hills and valleys. What in the world could it be?
The kids decide to do some investigating. They find out that the screaming goes on every night and guests are leaving the hotel in droves. Legend has it that one of Count Dracula's descendants lurks in the mountains. Beth doesn't believe vampire stories, but Leo isn't so sure, especially when some of the cows are found dead... with fang marks in their necks. And it isn't long before the kids learn "too much" about the Hidden Valley Hotel and are facing dangers more scary than vampires!