You're a student on a field trip with your fellow students, friends and teacher. Your bus stops in front of a church that was part of an itinerary. Once you disembark, the pale nun outside welcomes you to come inside for some prayers and holy bread. You and everyone else thus enter the church.

Unbeknownst to you, two of the students were last to enter and noticed something strange on top of the church...a bunch of bats circling the church bell. However you, the teacher and the rest of the class began sitting on the pews found in the church and began praying. As you've prayed you've suddenly felt a cold grip on your face. You were stunned and shocked. As you looked back you saw to your horror one of the students who entered last had blue cold skin, dark eyes and two long fangs portruding from their mouth. (Apparently what actually happened was that the bats outside circled them, bit them and thus turned them into vampires...even though you were clueless about what was going on in this current situation). The other students were also held and even bitten by the vampirized students. Meanwhile, the nun stood calmly and ominously as the chaos ensued. As for your teacher...she also got bit. You had to do something....anything to not end up like them.