Pu Dujun is an elderly person who lives alone. Every night, he would suffer from insomnia due to the unsettling flashes of the dark past. He tried in vain to pray and seek comfort in religion. His only friend is Mrs. Li, a church elder who gives him weekly church briefings. Mrs. Li invited him to attend a commemorative event at her church. Dujun was surprised to see the speaker's face. He is LIM Gwang han, a former senior official of Duk joon when he served as a police interrogator in the 1980s. They met for the first time in many years, and Guanghan once again mentioned Dujun's painful past.