Katherine Wright has a two-faced boyfriend. During the day, he is thoughtful, sweet, and a complete gentleman. However, once the sun sets, he turns into a completely different man. At night, he behaves like a feral beast, pursuing his desires in ever-changing ways.
Everyone calls her a lucky woman. She is deaf, but her boyfriend has never shunned her because of her disability. On top of that, he's even trying to help her find a cure.
Katherine thinks she is lucky to have him too. But one day, a robber steals the specially made medicine her boyfriend had given her to treat her deafness. Because of this, she stops taking the medicine.
Just as she is about to break the news to her boyfriend, she overhears his friend say, "You and your brother sure know how to have fun! One of you plays with her heart during the day, while the other toys with her body at night. It's been three years—I can't believe that deaf woman is still completely unaware of this!"
Hearing this, Katherine's blood runs cold.