"Triangle" Lee Beom Soo did not recognize his real birth sibling Kim Jae Joong.
On the first episode of MBC Monday/Tuesday drama "Triangle" broadcast on May 5th, Jang Dong Soo (played by Lee Beom Soo) couldn't recognize his actual younger sibling Huh Young Dahl.
On this day, Jang Dong Soo went in a hurry and made an emergency arrest with Ko Bok Tae (played by Kim Hyung Ok) with whom he had a horrible relationship. However, Ko Bok Tae, with the authority that he has, was released in one day.
Jang Dong Soo who lost Ko Bok Tae started to get involved with the investigation. In the middle of the investigation, Jang Dong Soo realized that Ko Bok Tae was related to the casino business and company. Therefore, knowing this information, Jang Dong Soo was even more determined to make the arrest.
Jang Dong Soo went to the nearest company and on the way, went to a police station. In the police station, he went to a detective and said to an information that he needed help and requested help.
That detective said that there was someone that fit the description and rode a car together with Jang Dong Soo. Jang Dong Soo's group was waiting in a car and was waiting for the right signal and at that time, Huh young Dahl appeared just wearing underwear.
Huh Young Dahl was being chased by someone. Jang Dong Soo saw Huh Young Dahl by coincidence and did not realize that it was Jang Dong Chul, a younger sibling who he had separated from when he was younger. Afterwards, he was wondering what was wrong and put the window down and looked out.
