
Signal
As the cold case squad closes in on the serial killer's identity, a man turns himself in.

As the cold case squad closes in on the serial killer's identity, a man turns himself in.

As he works to solve the serial murders, Park Hae Young learns the true source of the transmissions.

Jeong-oh tases a pregnant woman during a fight, leading to an investigation.

Accidents plague the Patrol Division; she's injured while breaking up fights.

Jeong-oh is shocked by the scene; Yang-chon scolds Sang-soo for everything.

Je-ha is permitted to enter Cloud Nine; he starts finding the truth of what happened in Iraq.

Je-ha becomes an indispensable member of JSS; as he guards Anna, he starts falling in love with her.

Yoo-jin appears in front of Je-ha and becomes an ally; he is assigned to guard Anna with a new code.

Luda, who is considered a troublemaker by the other mothers, takes an interest in Hyunjin.

Living as a mother, Hyun-jin gets extremely touchy. Joon-seok teaches Do-yoon how to comfort her.

As the cold case squad closes in on the serial killer's identity, a man turns himself in.

As he works to solve the serial murders, Park Hae Young learns the true source of the transmissions.

Yang-chon's life is tragic after he is degraded, demanded a divorce, and gossipped.

They face a different reality from what they had dreamed of. Yang-chon has an unexpected accident.

Jeong-oh and Sang-soo decide to be police officers. Entering the Academy, Yang-chon threatens them.

Se Joon uses an assassination attempt to further his campaign; Chief Joo offers Je Ha a job.

Yoo-jin chases Je-ha with state power; Je-ha decides to fight back as his close ones are in danger.

Je-ha becomes a target for removal after witnessing an affair and starts to be chased.

The youngest female director at Olively, Hyun-jin's water breaks during her meeting with a buyer.

The chief of police establishes a cold case team and assigns them to an infamous serial murder case.