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Win received a radio signal from a police officer named Yodchai, reporting the discovery of the body of a suspect in a murder case from 20 years ago. This prompted the investigation team to reopen the case, which is set to expire within 24 hours.

The hunt for the real culprit who murdered young Noina has begun. Lieutenant Win and Inspector Risa must track down the killer before the case reaches its statute of limitations in 24 hours.

"The Black Case Team" investigates unsolved cases. Wint spoke over the radio with Yodchai again. Wint wondered why Yodchai was investigating an old case where a young woman had been murdered, even though it had happened a long time ago.

Captain Yodchai is imprisoned, and Win informs him that there will be another murder victim-Ruedee, Yodchai's beloved. This forces Yodchai to find a way to escape from his cell and save the woman he loves in time.

After Yodchai failed to save his beloved, and after Win closed the Paet Riu case, Win tried to find Yodchai-only to realize that their communication through the radio was taking place in different timelines.

Yodchai lost contact with Win for six years, while for Win it had only been a week. Yodchai was working on the Manun Prosecutor's house case, and thus he and Win began another cross-time investigation.

Udom, the burglar, sought revenge on the one who caused his daughter's death, but his plan went wrong, and Risa was killed in the explosion instead.

Inspector Risa came back to life, but Win no longer wanted to communicate with Yodchai, fearing that if the past changed, the present would face another loss. Meanwhile, the Black Case Team began a new investigation.

The return of the woman who had already died was connected to Rome, Prosecutor Manun's son, and to evidence of corruption involving the Sinthawee Bridge. Meanwhile, the Black Case Team was being threatened by dark influences.

Win and Yodchai communicated through the radio once again, as Yodchai began investigating a serial killer who suffocated victims by covering their heads with a bag and tightening it until they died.

In the past, Risa was abducted by the killer but managed to escape. She then volunteered to undergo hypnosis to recover her memories once again, to find clues to the killer who was still at large.

Risa's recovered memories led her to walk along the streets he once ran through in the past. She eventually arrived at the murderer's house, where she discovered crucial evidence and the final victim.

Win pleaded with Yodchai to help with the student gang rape case at Panyatawee School, which was the last case written on Yodchai's note. The case was under the supervision of Inspector Komdech.

Yodchai began investigating the case, and many things seemed to have been staged. Still, he was determined to fight for justice for Wat, Win's older brother.

Win asked Yodchai to stop working on the case, fearing that Yodchai might be in danger. Yodchai insisted on continuing the fight for justice, while Win became a suspect in the murder of Deputy Pakdee.

Wat wanted to give Yodchai the evidence that would prove his innocence in the gang rape case. Deputy Pakdee, who was supposed to provide crucial evidence to Win, was killed to silence him.

Wat was killed to keep him quiet, and Win became a suspect in Deputy Pakdee's murder. Risa heard a mysterious radio transmission and provided clues about the case, while also needing to track down Chati, the key culprit.

In the present world, Win was shot. In the parallel world, Yodchai captured the key culprit, Commissioner Komdech. When Win regained consciousness, he found that current events had changed, and he began searching for Yodchai once again.