Goblin, también conocida en español como El guardián: El dios solitario y grande, es una serie de televisión surcoreana de drama romántico y fantasía, transmitida por TVN desde el 2 de diciembre de 2016 hasta el 21 de enero de 2017, protagonizada por Gong Yoo, Kim Go-eun, Lee Dong Wook, Yoo In-na y Yook Sungjae.
Zhang Hai Feng quits his job as a police officer after the death of his daughter, Duo Duo. However one day a serial murder case reveals new-found evidence about the the accident that led to Duo Duo's death. In order to find out the truth, Zhang Hai Feng starts to pursue the serial murderer and in the process, dies together with him. When he wakes up, he find himself back in the past; one day before his death occurs. He decides to make use of the wormhole to save Duo Duo from her death. Eventually, he starts to unravel deeply hidden secrets of the people around him, and the web of conspiracy that was planted 20 years ago.
Ye Xi, a kindhearted woman determined to become a martial arts hero, had fantasies about the martial arts world and true love when she first entered this world. She kept fighting for the weak against the strong, yet she didn't know that human beings could be evil and was repeatedly exploited, cheated and betrayed. She was even betrayed by the "kind martial arts master" who she had thought she could rely on. Her reputation was ruined and someone attempted to murder her for a few times. However, despite those heavy setbacks, Ye Xi remained true to her original aspiration and believed that good would always prevail over evil. She tried her best to reveal the truth and clear her name. During this time, Bai Yue, a miracle-working doctor saved her many times and was always by her side. Ye Xi also grew up, became stronger and more confident and learned what real love and martial arts spirit truly are. With Bai Yue's help, Ye Xi wiped out the evil people who framed her and became a true hero.
A psychological thriller anthology series focusing on a different hostage case every season.