Voice - Season 4 (2021)

The Golden Time Team heads to the hospital in search of the fleeing suspect, Gong Su Ji. Then the call center receives a report about a female diver who claims to have seen her granddaughter's dead body in a cauldron in the sea.

Kwon Joo's team and Derek continue to look for Su Ji and Ga Eun. Su Ji's belongings and what seems to be her will are found near the beach, and the local police officers assume that Su Ji committed suicide.

Kwon Joo's profiling leads to the conclusion that the Circus Man is in fact a man with multiple personalities. A call comes into the 112 call center from a man who is being chased by someone with a knife.

Kang Man Ho's father, Kang Seok Chun, is supposedly dead on paper. However, he is still alive, and his hidden story comes to light. Meanwhile, Derek hears the truth from Director Yang about his mom's death 28 years ago.

The Golden Time Team conducts a discreet operation to catch the user they believe to be Circus Man. Meanwhile, Eun Soo volunteers to transfer to the dispatch team.

Derek and Dae Shik finally catch the man who is suspected to have abducted and confined Saet Byul and Hyo Joon in a motel room. But he says he was also forced by a woman for money.

The man who Kwon Joo bumped into in the stairway was Dong Bang Min. He threatens Kwon Joo with a knife. Fortunately, Derek and Dae Sik arrive to save Kwon Joo.

The Golden Time Team arrests and interrogates Kwak Man Taek, the man who works for Dong Bang Min, after he confesses that he is the Circus Man. However, during the interrogation, he has a seizure and acts very strangely.

Kwon Joo and Derek chase after the person who snuck into the dorm. Kwon Joo sees something from a past dream that she had. Derek saves her from imminent danger, and they find out why they both saw strange visions.

The Golden Time Team figures out Dong Bang Min's dangerous plans. They chase him down to save Saet Byeol, the girl he has abducted. Backed into a corner, Dong Bang Min plans to escape the law once again with his sly tricks.

Dong Bang Min escapes from the psychiatric hospital and hides himself in Sonang Village. The villagers try to protect the village at all costs, although they are faced with the truth about Dong Bang Hyeon Yup.