Ten years after discovering her murdered uncle, Ena and Detective Hansaem must cooperate to stop a series of similar murders - each linked by strange puzzle pieces.

Kim Da-mi

Yoon Ena

Son Suk-ku

Kim Hansaem

Kim Sung-kyun

Yang Jeong-ho

Hyun Bong-sik

Choi San

Kwak Ja-hyung

Roh Su-kwang

Jang Gyeok-su

Hyeon Ho-geun / Hangang Police Station Chief

Jeong Man-sik

Tae Dong-su / Captain

Ahn So-yo

Yun Go-eun

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