S2·E17 Vampire Breath

It's the big 13 for Freddy and Kara, and their parents are going out for the night, telling the new teenagers that it's useless to look for their birthday presents. However, Freddy and Kara don't listen, and head downstars to the basement to search for them. With no luck, Freddy then sees a box on top of a high shelf. He bets anything that they're in that box. Though they never find out. Trying to reach it, the shelf topples over, revealing a hidden passageway in their basement. Following it, the kids find a dark, damp, and cold room. With a coffin. And in that coffin is a very bloodthirsty vampire...