Kim Shin is an eternal “goblin” with the prestigious role of being the Guardian of Souls. His housemate, Wang Yeo, holds an equally significant but contrasting position as the Angel of Death, serving as the legendary grim reaper who collects souls. Both of these strikingly attractive celestial beings face dilemmas: Wang Yeo suffers from memory loss, while Kim Shin desires to end his eternal life. The only way for a goblin to escape immortality is by marrying a human bride. To achieve this, Kim Shin sets his sights on Ji Eun Tak, a hopeful high school student he believes might be the priestess capable of ending his cursed life. Once tasked with safeguarding souls and guiding them to the afterlife, Kim Shin now seeks to send his own soul there. However, as his complex plan for self-destruction begins to blossom into genuine love, will the immortal goblin start to question his choice, knowing that pursuing this love could ultimately lead to his demise?