Park Hyung Sik's father is Lee Hae Yeong, shocking birth secret... Who planned it? ”Buried Heart”

*This article contains spoilers. Attention is focused on who sent the DNA test results to Park Hyung Sik.
The SBS Fri-Sat TV series "Buried Heart" has captured the attention of viewers with shocking developments in every episode, especially in EP12, where the main character Seo Dong-ji
Park Hyung Sik was surprised when he found out that Seo Dong-ju's father was Heo Il-do (Lee Hae Yeong) and not Yeo Sun-ho (Joo Sang-wook).
Prior to this, Seo Dong-ju believed that his father was Yeo Sun-ho. Through hypnosis, he was able to transform himself and his mother, Yeo Sun-ho, into a
Suno remembers that it was Heo Il-do who pushed the car they were in off the cliff. Heo Il-do has already tried to kill Seo Dong-ju multiple times on Yeom Jang-seon's orders.
Seo Dong-ju expressed anger at the fact that she and her beloved Yeo Eun-nam (Hong Hwa Yeon) may be half-siblings and that Heo Il-do killed her parents.
However, this was not true. Seo Dong-ju's father was Heo Il-do. When Seo Dong-ju was looking at documents to find out Yeom Jang-seon's weaknesses, he discovered the secret of his own birth.
They decide to check the recording of Yeom Jang-seon, who is talking about something related to the matter. At this time, Seo Dong-ju receives a mysterious letter in the mail. Inside the envelope is a letter that reveals the relationship between Seo Dong-ju and Heo Il-do.
The document contained the results of a DNA test that proved his identity. Seo Dong-ju had discovered the secret of his birth (that he was Heo Il-do's real son) and was known only to his accomplice, Bae.
The only ones left are Wonbae (Lee Yoo-jun) and Myung Tae-geum (Gong Ji-ho). Did they send the DNA test results to Seo Dong-ju to let him know about this?
In this regard, the production team said, "In EP13 of 'Buried Heart,' we will be discussing the father-son relationship between Seo Dong-ju and Heo Il-do.
Various truths will come to light that will shake up Seo Dong-ju and Heo Il-do and bring about turmoil in the drama. What is the truth? Who planned the plan?
Please concentrate and watch to find out who it is." Meanwhile, SBS Fri-Sat TV Series "Buried Heart" is broadcast in Korea every Friday and Saturday at 9:50 pm.