At the request of Rustem Pasha, a lot of letters came from Manisa from the nobility, who praised Mustafa and called him the future sultan.
In one of these letters, Mustafa was compared to the father of Suleiman, who at one time overthrew his father from the throne.
After reading these epithets, Suleiman was furious, but later decided to send Mustafa a rich caftan and a letter in which he instructed his son to pay attention to how his subjects treated him.
Alexandra Anastasia Lisowska, having learned that Suleiman ordered to sew a caftan for Shahzadeh, decided to play on it. She remembered the story that happened to Suleiman when he was still Shahzadeh.
Young Suleiman received a very beautiful and expensive caftan from his father. But Suleiman's mother, at the last moment, suspected something was wrong and ordered the servant who delivered it to put on the caftan. The caftan was poisoned and the servant could not be saved.
About this story knew not only Khyurrem, but also Makhidevran, and Khyurrem's calculation was as follows: they will poison the caftan and then, or Mustafa will wear caftan and leave this world, or Mahidevran will have time to save him, but Shahzadeh will think that it was his father who poisoned the caftan and will raise against him a riot.
Mahidevran managed to save her son and told him a story about the poisoned caftan.
Mustafa, considering that his father in such a mean way decided to get rid of him, gathered an army and set off for the capital.
On the way, the janissaries stood in his way, who, by order of the sovereign, were supposed to return Mustafa to their sanjak, but they sided with Mustafa and set off in a large army to the palace.
Mustafa demanded a meeting with the sovereign, where he said that he had come not to take his father's life, but to give him his own.
Having learned the reason for the appearance of Shahzadeh in the capital, Suleiman realized that someone was trying to turn his son against his father and ordered Sokol to secretly investigate the case.
Alexandra Anastasia Lisowska and Rustem's plan failed. Mustafa once again proved his loyalty to his father, and the sovereign vowed that he would continue to trust his son and during the military campaign it was he who entrusted his throne and appointed the regent of the state.