Lisa is the friend of Donna(Brittany Snow) and they arrive at the prom together. They got prepared for prom together and they are really close. She is nominated for prom queen and up against a very snobby schoolmate. As she and her beau are going up to the suite she notices Donna's stalker but doesn't realize right off. When she finally does so she tries to make it to her friend and warn her...but Lisa doesn't know if whether she is too late.