While in Europe searching for their missing father, the Hardy Boys meet Nancy Drew and team up on a case that takes them to a rock festival in Transylvania held at Dracula's castle.
When Fenton disappears while in Europe, Joe and Frank go there to find him. Eventually they meet a Romanian police inspector who's working with their father. They also run into Nancy Drew; it seems that Fenton was working for her father and she came to find out what he learned. Eventually they find themselves in the village where Dracula is from.—rcs0411@yahoo.com