Background
The scriptwriter is inspired by the Incheon Elementary School Murder case in 2017.
"I want the defendant to know how precious our youngest child was..." In 2017, at the Incheon Elementary School murder trial, this is what the mother of the child victim said. Unfortunately, that did not happen.
When the victim’s mother asked the defendant what was the hardest thing right now, the defendant's answer was not sorry or guilt. Instead, the defendant said, "The weather is nice, but it's the hardest for me not to see cherry blossoms.“
The whole nation was shocked and furious at the defendant's response. Perhaps it is natural for the defendant to give such an answer. After all, the defendant was born with a different gene from ours, the "Psychopathic Gene". Psychopath has the same brain as ordinary human beings, but without a mirror neuron. She does not feel the pain of others at all. Neither can they perceive other feelings such as guilt, sympathy, compassion, or regret. Therefore, we cannot expect repentance or atonement from the defendant. That's why the defendant could not understand that the child she brutally murdered is, in fact, precious to his parents.
Victims' families can only spend their entire lives in pain while the perpetrators spent the rest of their lives trying to kill. They have the genes that enable them to turn a blind eye to what they have done and live comfortably, without feeling even 1% of the remorse or guilt that they should have felt and that gives rise to unbearable rage.
The scriptwriter planned the drama in this backdrop. The psychopaths are the ones who believe in what they have done. As the scriptwriter wanted to see psychopath murderers feel the pain, reflect on their actions, and atone. Even if there’s only a slight chance that they will feel empathy, they should understand their sins sincerely and feel remorse. That would be the best punishment and salvation for the psychopathic murderers.
Synopsis
Mouse fantasizes the scenario, what if psychopaths can feel remorse and guilt for their actions. It follows Jeong Ba-reum (Lee Seung-gi), a steadfast police officer, whose life changes when he encounters a psychopathic serial killer. This drives him and his partner Go Moo-chi (Lee Hee-joon) to unearth the truth behind psychopathic behaviours. This also raises the questions, whether it is possible to scan a psychopath in the mother's womb using fetal genetic testing? And if the child in the womb is a psychopath, will it be wise to have that child?
