To pay off their debts, Endah and her close friends take seasonal jobs at a remote sugar mill in Java. All workers there must follow strict curfew rules, forbidden from leaving their quarters at night under constant guard. One night, Endah secretly sneaks out and accidentally witnesses a strange ritual that awakens a demonic force. From that moment on, terrifying events plague the mill, and anyone could be the next chosen sacrifice. To survive, Endah and her friends must uncover the dark secrets buried deep within the mill and confront an invisible force of immense power.