Prince Alaaddin's unexpected death prompts Murad Khan to retreat to Bursa, succeeded by his son Mehmed. Despite being perceived as immature by European states, Mehmed proves otherwise when faced with Orhan, backed by Byzantium, in his first major battle for the throne. Mehmed's dream is to conquer Constantinople, despite doubts from those around him, including Çandarlı. Mehmed's determination leads to clashes with rebels, orchestrated by Çandarlı, resulting in his exile. However, Mehmed remains resolute, destined to return as sultan one day.
Mehmed, having left the throne to his father Murad, returns to Saruhan to address local issues, including pirates obstructing trade. Solving this would fulfill the people's wishes and address a personal problem for Mehmed.
Mehmed proved his innocence to Sultan Murad by capturing Capello. Murad then questioned Mehmed about the silver coins printed in his name, which Mehmed explained. With the Crusaders advancing, Mehmed proposed an Oghuz Union, which Çandarlı opposed. The council awaited Murad's decision.
Mehmed narrowly escapes an ambush by Janosh and faces the challenge of assisting his father, Murad, who is under attack from Wallachians with explosive pots. Murad must also defend himself against a sneaky Wallachian.
On the night of his wedding, Mehmed embarks on a risky journey to Constantinople to save Zağanos, collaborating with an unexpected ally from the Byzantine palace. He also meets Urban, hoping to convince him to return. Mehmed's plans are shattered by news of his mother's death, causing him to question his father.
Prince Mehmed, ambushed by the poor, fights fiercely as İshak approaches with his men. Mehmed later returns to Edirne and moves his harem to Manisa, where he receives a letter to Gülşah prompting a journey to Karamanoğlu.
Following Sultan Murad's unexpected death, the Ottoman palace mourns and a new era begins. The question arises: will Mehmed or Orhan ascend to the throne? Despite İshak's opposition, Çandarlı supports Mehmed's succession, fearing unfortunate consequences.
After ascending to the throne, Mehmed confronts Halime for attempting to kidnap Ahmed and Çandarlı for his alleged complicity. Halime faces a choice: implicate Çandarlı or remain silent.
While campaigning against Karaman, Mehmed invites Evrenesoğlu Ali to handle potential issues in the capital, appointing him as the palace trustee. Çandarlı, remaining in the capital, plots to place Ahmed on the throne by manipulating Gülşah, facing obstacles from Halime who also aims to make Ahmed sultan.
After Prince Ahmed's death and Kurtçu Doğan's execution of Mehmed, Mehmed declares a new era, removing Kurtçu Doğan from Ocak Ağa and punishing the rebels. He reaffirms his goal of conquering Constantinople.
Mehmed, having executed the Byzantine ambassador, announces his goal and demands immediate preparations, instructing Urban to expedite his work. He sends Zağanos Pasha to implement a justice revolution and prepare for conquest, but Zağanos returns unsuccessful. Determined, Mehmed plans to personally convince Hızır Çelebi.
A cannon explodes near Mehmed, turning the area into chaos. Quickly removed, Mehmed faces more disappointments, including a fortress raid and Mara's kidnapping, pushing him to demand accountability from the betrayer and the careless.
Constantine reveals the truth to Mehmed when handing over Mara, exposing Çandarlı Halil's collaboration. Mara must decide whether to inform Mehmed or confront Çandarlı herself. Tired of political games, Mehmed sets his sights on conquering Dimitria Castle.
The Ottoman army, led by Zaganos, faced resistance at Dimitria Castle. When hope seemed lost, Sultan Mehmed arrived, inspired his soldiers, and ordered a final attack, aiming for victory. Meanwhile, the Hurufis, taking over provisions and spreading propaganda in the capital, face a new challenge as Mehmed is determined to protect his state from corrupt beliefs.
After conquering Dimitria Castle and defeating the Hurufi plague, Mehmed sets his sights on Constantinople. He tasks Evrenosoğlu with eliminating Orhan, aiming to trap him with a plan involving Hala Sultan. Meanwhile, Konstantinos, seeking to recover from his defeat, sends Sfrancis to attack the dervishes, hoping to prove the Turks cannot establish themselves. This draws the Ottomans towards him, and Çandarlı marches to confront Sfrancis.