The Protector follows the journey of Hakan Demir, a young shopkeeper living in modern-day Istanbul whose life is turned upside down when he discovers his connection to an ancient secret order. Tasked with the duty of protecting the city from the 'Immortals'—mysterious, malevolent forces that threaten to destroy everything—Hakan must embrace his destiny as the last Protector. As he navigates his new responsibilities, Hakan struggles to balance his ordinary life with the dangerous demands of his supernatural heritage. Along the way, he is aided by the 'Loyals,' a group dedicated to supporting the Protector, while facing betrayal, complex moral dilemmas, and a race against time to prevent the total collapse of Istanbul. The series blends historical mythology with contemporary urban fantasy, exploring themes of legacy, sacrifice, and the weight of power.