Descent (2007)

Descent (2007) stars Rosario Dawson as a plucky co-ed who is dragged to a frat party by a friend and winds up meeting a very, very bad dude. He's Chad Faust, and Rosario pegs him right away as the kind of Neanderthal numbskull she can't stand. But Chad is especially slick for a cad, and eventually she gives in and agrees to go out on a date. Things start out okay in a dinner-and-bouquet way but turn sour on the second date when Rosario won't give him what he wants. Chad, being a cad, ravages her. From there, Rosario's life spins out of control as she turns toward partying hard to ease her pain. Sucked into a blitzed-out, coke-snorting nightclub netherworld, she becomes involved with DJ-dealer-pimp Marcus Patrick, and together they plot a ghastly revenge against bad old Chad.