Pil-soo is in trouble because there are fewer customers at the chicken restaurant. To make matters worse his wife hears a story she shouldn't hear.
Pil-soo and Jung-seok who are on the verge of being kicked out of the mansion! They immediately start to find the owner of the sword but it creaks from the beginning. Pil-soo and Jung-seok who can't understand each other's way eventually split up. Meanwhile a man who appeared to Pil-soo's wife! He takes care of the 'important day' that Pil-soo forgot about even the essential day...
Pil-soo's family has become uncomfortable living together with strangers such as Man-geum and Jung Seok. Meanwhile he learns from Jung-seok that Man-geum is a loan shark. He sneaks into the cellar where Man-geum is prohibited from entering and witnesses an incredible sight...
Pil-soo's family enters the mansion. But he hears a vicious rumor about the mansion. Meanwhile Jung Seok miraculously meets another investment company. When he is about to take a new opportunity! He receives shocking news...
Goo Pil-soo owner of a chicken restaurant who became one with chicken for his family! He who is in his 40s is on the verge of being kicked out of his rented house. Meanwhile Jung Seok CEO of a start-up company is running toward success with the spirit of his 20s. He too is on the verge of shutting down his company. Two men in front of a crisis! They meet a mysterious grandmother in her 70s in different places...
After witnessing Doha's spirit, Young-hwa is shaken and recalls forgotten childhood memories. As Jun-oh watches Young-hwa, he forces himself to let go of his lingering feelings for her recognition of him and steels his resolve to kill her.
Possessed by Doha, Jun-oh is unsettled, unsure if Young-hwa has truly recognized him. Meanwhile, Young-hwa dreams again and wonders if she only sees Doha because of her growing feelings for Jun-oh. Detective Min-oh, investigating Jun-oh's case, recalls Cheol-hwan and orders his whereabouts tracked. Concerned for Jun-oh, Min-oh arranges for Young-hwa to stay at Jun-oh's home.
While unconscious, Young-hwa dreams of a past life: Hanrita infiltrates Doha's mansion to avenge her parents' murder but fails to kill him. Unexpectedly, Doha spares her life, forcing her to remain as a maid. Hanrita notices the unusual relationship between Doha and his foster father, Soribu. Soribu also realizes that Hanrita is not a real maid.
Young-hwa is named “Firefighter of the Month” for saving Jun-oh. Before leaving for an Antarctic mission, she visits her father's forest grave and meets a head monk, who warns her never to take off her bracelet. Meanwhile, Jun-oh cancels Young-hwa's Antarctic selection interview to keep her by his side. Realizing his scheme, Young-hwa seeks him out on set, only to find him collapsed. Suddenly, both are kidnapped by hired thugs.
Jun-oh is revived as Doha possesses him, and he immediately tries to kill Young-hwa in the hospital but fails due to an unknown force. Believing she has simply saved Jun-oh, Young-hwa is overjoyed. But those around Jun-oh grow uneasy as his behavior changes drastically. Jun-oh soon learns of a protective talisman shielding Young-hwa.
Young-hwa is called a “miracle firefighter” because no one dies at the scenes she responds to. Though she is sometimes plagued by nightmares from 1,500 years ago, she remembers nothing upon waking. Meanwhile, arrogant top star Jun-oh films a public-service ad as an honorary firefighter to cover up a scandal with Lee-seul. When Jun-oh and Young-hwa meet, they bicker from the start.
Jun-oh narrowly saves Young-hwa, realizing he may never be able to kill her. Young-hwa confesses her true feelings to him.
Jun-oh realizes he is hesitating to kill Young-hwa. On her way to meet him, she encounters Cheol-hwan, who cryptically warns her to beware of ghosts.
Young-hwa decides to help Jun-oh find peace in death, but when her dreams of the past cease, she feels disheartened. Pretending she still dreams, she lies to Jun-oh who quickly sees through her.
Though Jun-oh reveals his true identity, Young-hwa refuses to accept it. Conflicted, she replays past events and begins to suspect his words may be true. Jun-oh manages to convince her, but his disregard for her life enrages Young-hwa, who tells him never to see her again.
After witnessing Doha's spirit, Young-hwa is shaken and recalls forgotten childhood memories. As Jun-oh watches Young-hwa, he forces himself to let go of his lingering feelings for her recognition of him and steels his resolve to kill her.
Possessed by Doha, Jun-oh is unsettled, unsure if Young-hwa has truly recognized him. Meanwhile, Young-hwa dreams again and wonders if she only sees Doha because of her growing feelings for Jun-oh. Detective Min-oh, investigating Jun-oh's case, recalls Cheol-hwan and orders his whereabouts tracked. Concerned for Jun-oh, Min-oh arranges for Young-hwa to stay at Jun-oh's home.
On the outside, Hyun-oh seems to have grown up in a warm and wealthy family, but he carries a secret pain he has never shared, not even with Eun-ho. He chose to break up with her because he could not bear to share his unhappiness with the woman he loved.
After blacking out from her panic attack, Eun-ho wakes up at home. Hyun-oh is quietly sitting beside her, watching over her. His gentle care reminds her of the days when they were madly in love, which feels unfamiliar yet comforting.
Eun-ho's identity keeps drifting between herself and Hyeri. The psychiatrist advises that they uncover the link between the two.