Four students who are threatened with drop out because of arrears in college for 4 consecutive semesters, namely Gito (Deddy Mahendra Desta), Dede (Ringgo Agus Rahman), Kuncoro (Sukma Perdana Manaf), and Rojak (Judika Sihotang). They were hired as apprentices at the Fire Department, as a Reserve Force with makeshift equipment and given the task of caring for an old fire engine, known as Si Jago Merah.