In Hotel King, episode 22, Cha Jae Wan(played by Lee Dong Wook) saved Lee Joong Goo(played by Lee Duk Hwa).
Previously, Loman Lee(played by Jin Tae Hyun) pushed Joong Goo into a hole and left. He told Jae Wan that he buried Joong Goo. He added, “He might die if no one saves him.”
Jae Wan went to the mountain where Joong Goo was. He wanted to leave him there but he eventually help his father escape the hole. Joong Goo said to Jae Wan after coming out of the hole, “Your real name is Hyun Woo. Your mom gave that name.”