In the quiet halls of their school after dark, three students confront waves of supernatural enemies that have invaded the grounds. Working together through shadowed corridors, they push back the otherworldly threats one by one until their mission seems nearly complete. As they prepare to depart, however, a sudden assault overwhelms them, leaving the group captured and isolated within the building. Now trapped by the very forces they fought, the students must find a way to regain their freedom before dawn.
