Black Card of the Doorman

Logan Pierce, a Miami night guard, is humiliated by his boss and mocked by his gold-digging ex-wife Jessica. After saving a dying old man in an alley, he receives a black card that unlocks a vast underworld empire. He stays in his guard uniform, casually buys the building where he works, and crushes everyone who wronged him. As he rises to power, he takes down the city's corrupt elites. Jessica later finds him as Miami's new kingpin, but he coldly dismisses her. At his side is Elena, a ruthless assassin fiercely loyal to him alone—his only potential weakness, or his greatest strength.