Guardian: The Lonely and Great God

About the series

Contains story spoilers.

Before he becomes the supernatural figure known as a goblin, Kim Shin is a celebrated Goryeo general whose loyalty to his king ends in betrayal. He dies with a sword driven through his chest, and a divine punishment restores him as an immortal being, leaving the blade visible only to the woman destined to be his bride. The curse has an apparent solution, but it is also a promise of loneliness: once the bride pulls the sword free, Kim Shin will finally die. Centuries pass while he watches generations change and tries to decide whether release is worth the loss of everything he has become.

In contemporary Seoul, Ji Eun-tak grows up with an ability that sets her apart: she sees spirits and can summon Kim Shin by blowing out a candle. Her childhood has been shaped by the death of her mother and by a hostile aunt who treats her as a burden. Eun-tak is not a passive answer to Kim Shin’s problem. She is a high-school student making plans for an independent life, and she approaches the supernatural with direct questions, jokes and practical demands. When she identifies herself as the goblin’s bride, Kim Shin initially sees a route to the death he wants, while Eun-tak sees a strange adult who might help her escape her family’s control.

The arrangement becomes more complicated when Eun-tak moves into Kim Shin’s house and discovers that he shares it with a Grim Reaper. The Reaper has no memory of his mortal life and works by escorting the dead onward, yet at home he is an awkward roommate who has to learn ordinary social rules. Their conflict over the house develops into an unlikely friendship, with Yoo Deok-hwa, heir to the family that has cared for Kim Shin across generations, caught between them. The domestic comedy does not erase the story’s darker premise: the goblin wants death, the Reaper serves it, and Eun-tak’s future may depend on whether she can see and remove the sword.

A second romance grows around Sunny, the confident owner of a chicken restaurant where Eun-tak finds work. The Reaper is drawn to Sunny before he understands why her face and presence affect him so strongly. Kim Shin eventually recognizes her as Kim Sun, his sister from the Goryeo past, and the Reaper’s missing memories begin to connect him to the same history. The present-day relationships are therefore shaped by an old royal tragedy: Kim Shin’s service to a jealous king cost his sister her life, while the king’s guilt and punishment left him reincarnated as the Reaper. Recognition does not simply restore a lost romance; it forces the characters to face the harm their previous selves caused.

The series makes its central bargain increasingly painful as Eun-tak learns what her role means. The sword is not a decorative mark but the mechanism that can end Kim Shin’s immortality, and her ability to see it makes her uniquely capable of fulfilling the prophecy. Kim Shin begins to love the person whose task would kill him, while Eun-tak understands that the choice would also take away someone she wants to keep. Their separation is not caused by a lack of affection but by two incompatible meanings of the same act: for him, removal once seemed like freedom; for her, it risks turning love into an execution. A threatening figure from the past presses on this already unstable decision.

That figure is Park Joong-heon, a Goryeo-era traitor who returns as a malevolent spirit and tries to use the characters’ intertwined lives against them. His presence brings the buried royal history into the present, while the deity who has been arranging events remains an unsettling force rather than a reassuring guardian. Kim Shin, the Reaper and Eun-tak must act together to protect Sunny and one another, even as memories reveal why their lives were joined. The supernatural conflict does not offer a clean undoing of past violence; the living characters can only choose what responsibility they accept now, and whether they will repeat the cruelty that defined their former identities. Park possesses Eun-tak, trying to turn the bride into a means of removing Kim Shin’s protection. Kim Shin uses her hand to draw the sword and destroys the spirit with it, accepting that the same weapon will end his own presence in the world. The rescue makes the prophecy a decision taken to save her rather than a simple fulfillment of his earlier wish to die.

Nine years after Kim Shin disappears, Eun-tak works in radio and lives with an unexplained sadness, having lost her conscious memories of him. Her summoning brings him back, and a trip to Canada helps their relationship and memories return. They marry, but their happiness is interrupted when she deliberately places her car in the path of a runaway truck to save a bus of children. She dies and refuses the tea that would erase her memories before passing onward, promising to find him again. Decades later, the Reaper completes his punishment by guiding Sunny into the afterlife. Kim Shin subsequently sees their reincarnations meet as a detective and an actress, free to begin a different relationship. He remains immortal and waits until Eun-tak is reborn and approaches him in Canada. Their reunion offers hope, but it does not undo the deaths, separations or long stretches of solitude through which that hope survives.