Sophie's 18th birthday party becomes a bloodbath when six terrifying monsters descend upon her house, intent on devouring the party guests and killing anyone who tries to leave. As her school friends are torn apart and eaten, Sophie must rally a band of misfits and take up arms to send their party crashers back to hell. To survive the night, Sophie will face her destiny; monsters are real - and she's the only one who can stop them.
As Sophie and her newfound allies battle the monstrous attackers, they discover that there is more at stake than just survival. With each defeat, the creatures grow stronger and more numerous, and the fate of the world hangs in the balance. Can Sophie and her friends find a way to defeat these ancient forces before it's too late?