Why did Anoosh have to leave so quickly after his arrival? Where did he go?

Fereydoon had become the minister of justice. Anoosh had similar political ideas as his uncle, but Anoosh’s father had remained loyal to the Shah. Anoosh had become Fereydoon’s secretary but one day he had come to work to find that the Shah’s soldiers had arrested Fereydoon. Anoosh had to run away.