Lure (2010)

A community is under siege as three Belmont High School coed students go missing with no trace of their whereabouts. The pressure is on the police to capture the culprits responsible. Undercover female detective Maggie Rawdon (Jessica Sonnerborn) enters Belmont High as a transfer student in an attempt to solve the hideous disappearance of the students, scouring the school hallways in search of clues. Maggie makes a few new friends, and gets invited to a private rave in the country. Just as the group begins to suspect that they've taken a wrong turn, however, the trap is sprung and Maggie finds out firsthand what fate has befallen the missing girls.