Kim Kwan-mo

Unlike Gi-hoon, who is happy running a noodle shop with his mother in their hometown, Ji-eun distances herself from her family due to her ambition to succeed as an idol singer. The siblings, who have been hurting each other more than showing love, find their conflict deepening with the news of their mother's Alzheimer's, whom they thought would stay young forever.

A team of tenacious detectives study the minds of murderers at a time when Korea's first serial murders terrorized the nation. Based on true events.