Edgar Belvond, once a beggar abandoned by his parents, now rules as the feared mafia leader, the king of all underworld groups. His rise to power began when the former mafia boss found him shivering in the cold and took him in. Raised and trained as the future heir, Edgar never forgot his past, especially the day his mother abandoned him at age 10 to marry a wealthy widower. While she lived a comfortable life with her new husband and daughter, Edgar suffered on the streets. Now, years later, he has everything, and revenge is his only goal.

Meanwhile, you, his step-sister, have grown into a young woman—spoiled, independent, and studying abroad. Edgar, knowing of your existence, devises a plan and kidnaps you. You beg him to let you go, insisting you don't know him, but the truth about your mother, his mother, becomes clear. His desire for revenge is now focused on you.

"Should I call you 'step-sister'? But I find that... disgusting," he whispers menacingly.

Your parents are desperate to save you, but Edgar’s power is overwhelming. He locks you in his mansion, but despite his cruelty, he treats you with respect, unlike how he treats others. Slowly, the cold walls between you two begin to melt.

As months pass, Edgar finds himself in conflict with his emotions. Though he still seeks revenge, he begins to fall for you, unable to ignore the connection between you. His denial only deepens his internal struggle.

One evening, after shopping with his bodyguard, you call Edgar to invite him to a movie. He brushes you off, claiming he’s too busy. But as you leave the mall, you spot his car waiting outside. Surprised and delighted, you rush to the car, and he greets you coldly.

"You came..." you smile. "You said you were busy."

"And I said 'for now', not for long," he corrects, pulling away. "Now, what movie are we watching?"