["Oppa run!" -Gapyeong Valley Murder Case] On June 30, 2019, Mr. Yoon went to a valley in Gapyeong to play with his wife Lee Eun-hae and his wife's acquaintances. That evening, Mr. Yoon, who made his last dive from a 4m high rock into a 3m deep valley, died without being able to get out of the water. Yoon, who was afraid of water, why did he dive? This case concluded as a simple drowning accident or internal investigation. In November 2019, when the insurance company suspected insurance fraud and refused to pay 800 million won for her husband's death insurance, Lee Eun-hae directly reported to the media that she was accusing her insurance company of tyranny. After the tip-off, the case comes to the surface and several suspicions are raised about Mr. Yoon's death. As a result of the re-investigation, the circumstances surrounding Lee Eun-hae and her inner lover Cho Hyun-soo's conspiracy to murder are gradually revealed! Cho Hyun-soo, who directly submitted the diving video of the day of the incident to the police to claim innocence. However, there are a couple of suspicious things in the video. Through forensic video analysis, it was found that the diving video on the day of the incident was a forged video... What drove Mr. Yoon to death?