The film, based on a Jean Stelli sroty, tells the adventures of a lieutenant of marines and the mystery of the ship explosion caused by a spy network.

One day, Murat, a firefighter from Kadırga, goes to put out a fire at a mansion. Hilmi Pasha's daughter, Müjgân, sees Murat and falls in love with him. Müjgân's brother, Nihat, wants to become a firefighter like Murat. Müjgân and Murat meet again on this occasion. Müjgân confesses her love to Murat in a letter. However, Murat has promised Hilmi Pasha that he will protect his family's honor. Therefore, he is forced to reject Müjgân's love. Meanwhile, Murat's rival, Yalaza Nuri, learns of the closeness between the two.

After arguing with Neset, who wants to marry Hasan Pasha's daughter, Nazan, Sevki meets Nazan, the daughter of the house. After a while, an emotional closeness develops between Nazan and Sevki.