After the Kim Yoon Jung kidnapping case, the Chief of police creates a cold case squad. Their first case is the infamous Gyeonggi Nambu serial murders.

During the investigation of the serial murders, Park Hae Young discovers that the radio transmissions are actually connecting him to the past.

The cold case squad figures out who the serial killer is, but not before the wrong suspect turns himself in.

Park Hae Young begins asking questions about Lee Jae Han. Meanwhile, the police force in Lee Jan Han’s time struggles with a string of larceny cases.

Cher and Gun help Thoop to be released from jail after he is arrested for drug charges. While waiting at the jail with him, Thoop reveals the truth behind Tian’s…

Koito gives Elda a device known only as “The Smartphone,” a choice she will soon learn to regret. Later, Koito realizes Elda has an unchanging wardrobe.

The Eclipse – Wat presents his short film while Akk and Ayan continue to work on their song together.

Seung Jun makes good on his word to give Jae Hyun vocal lessons, and the two of them gradually become closer.