The people of Anatolia were forced to live under the circumstances of the danger caused by the presence of the Byzantine empire while suffering from Mongolian invasion. Kayı tribe is a frontiersman that remains its' presence at Söğüt. Because of where the tribe is located to face the Byzantine danger, they are in a continuous state of red alert. Giving the conditions and the sickness of Ertuğrul Ghazi, there occurred a power vacuum. The power struggle caused by this war of principality is between Osman who is heroic and brave is the youngest child of Ertuğrul Ghazi and the uncle of Osman; Dündar and Gündüz who is good at statesmanship. Dündar is the most successful man in the field of politics after his elder brother Ertuğrul Ghazi. After his brother's sickness emerged, his hunger for power has increased. Dündar is born ready to defeat whoever is against him on this path to power. Aygül, on the other hand, is responsible for the women administration that lives in the Kayi tribe, and ever since they were a child she is in love with Osman and wishes to marry him. The brave and beautiful Bala Hanım who is the daughter of Şeyh Edebali is after some truths to protect her people. For they both prioritize their people's future, Bala Hanım's and Osman's path has crossed. They fall in love at first sight. Although, betrayals and plots cause major obstacles for their love. Osman will fight internally and externally, both for the sake of the Kayı tribe's future and for rejoining with Bala Hanım by overcoming the obstacles they faced.