14th-century knights transport a suspected witch to a monastery, where monks deduce that her powers could be the source of the Black Plague.

Seven high-school friends begin their Euro-trip at the actual castle of Vlad the Impaler where he supposedly sold his soul to the devil over 500 years earlier, but the decrepit castle’s past envelopes them in a bloody ritual.

The process of excavating an ominous grave unleashes dreadful consequences buried underneath.