A girl is living peacefully in her house when one day she gets a letter saying that her one and only uncle died and she is the owner of his properties. She doesn't want to leave her house but she has no option; she can't pay the rent and the owner of that house either wants the money or the house asap. So she packs her bag and goes to live at her uncle's house, which is hers now.
Her uncle's house is not a house; it's a mansion, so big and so beautiful she likes staying there. But she hears noises, strange noises, and then she figures out that there is one room in the house that she is not able to open. After trying to open that door and doing all the work, she is tired; she goes to her room and sleeps. But when she wakes up in the morning, she sees herself in a room which she has never seen.
He was sitting there on the arm chair, waiting for her to wake up. As she woke up, she saw him looking at her with a smirk on his face; he looked like a devil.
She asked, "who are you? where am I? And how did I end here? I was sleeping in my room; I remember that, then how...?"
He said, "Relax diablita, [little devil]. I know you have questions, and we both have plenty of time to answer those. But first, listen and understand: you are mine, diablita you are mine."
