Vivian, the bankrupt heiress, walks in on her fiancé and her best friend plotting to pull her father's ventilator plug at their engagement party. While fleeing, she falls into the arms of her fiancé's uncle—Alistair, the "Tyrant of Wall Street." He offers to save her father in exchange for a binding marriage contract. Vivian fights back: she gets her fiancé drunk and ruins his reputation, and sends her best friend to prison. But she mistakenly believes Alistair is the one who killed her mother, and teams up with foreign investors to short his conglomerate. When the truth comes to light—he is the boy who saved her from a fire ten years ago, his back bearing burns that never healed—the two powerhouses join forces. She takes control of the financial empire in the open, while he secretly deploys phantom funds to counterattack. The scumbag fiancé goes bankrupt, the best friend descends into madness, and the mastermind behind it all is left without access to medical care. At the pinnacle of their victory, he kneels and fastens a necklace around her ankle: "I am willing to be your prisoner." She lifts his chin with a smile: "We have been each other's captives all along."
