Lee Sung-min

Kang Yeo-joo is a best-selling writer. She only writes crime stories, dealing with cruel murder cases. She constantly thinks about how to murder people for her novels. Kang Yeo-Joo is married to Han Woo-sung. He is a lawyer, specializing in divorce. He wrote a memo to his wife stating "If I cheat, I die."

Yoo Seol-Ok liked mystery novels and wanted to become a detective, but she gave up her dream after marrying. Now, she is a housewife with a husband who works as a prosecutor. She meets Ha Wan-Seung. He is a passionate detective and they decide to collaborate to solve cases.

A high school teacher whose wife is about to give birth finds himself tangled in temptation and obsession when a student falls for him.

A rebellious high school student sees his life take a strange turn when he goes to the grocery store and someone leaves a baby in his shopping cart, along with a note claiming he's the father.