Eun Gye-hoon, a famous chef, opens a restaurant in a town he lived when he was a little kid. In the past, he had a twin sister. But after a traumatic incident tat the hometown, the family lost her. He used to have a strong emotional link to his sister, able to synchronize with any kinds of feelings she was having. When Noh Da-hyun, a young woman in need of help, visits him one day, Gye-hoon starts to feel that strong link again.

A 17-year-old case, known as the scam of the century, reemerges as a serial murder case in the present year 2023. It’s a nationwide crime case thriller revolving around three people.