The Call You Just Made Is

Hong Heejoo, a mute sign language interpreter battling severe depression, has been trapped in a loveless arranged marriage for three years.
One day, her life takes a harrowing turn when she's taken hostage. Desperate for help, she calls her estranged husband, only to be met with indifference.
"Call me when there's a body," he coldly replies, hanging up.
Enraged, Heejoo decides to strike back. She'll threaten her husband anonymously, no matter the cost. But there's a twist: her target is the notorious Blue House spokesperson, a man known for his biting sarcasm.
As the threats escalate, Heejoo begins to question her own sanity. Is this really the same man she married? And why does this twisted game feel so strangely exhilarating?