Park Jimin is tearing his hair out. His estate has turned into a hotel, and the one man he vowed would never reside under his roof is clogging up his halls and getting on his nerves. The arrival of her enigmatic ex, however, is exactly what Hahm Yunhee hoped for. Holding crucial information, Tae is key to locating Hobi, but within hours of his arrival, Yunhee finds herself plagued by the haunting whispers of his oppressive doppelgänger. Unaware of the danger lurking in the shadows, the mismatched team learn to put their differences aside and work together to locate their missing friend, but when Kim Seokjin uncovers a legendary myth shedding light onto the existence of the vortex, the test of fate really begins. Torn between a greater good and an omnipresent evil, Yunhee fights to counter the potent lure of Kim Taehyung, but what happens when she finds herself ensnared in his trap and unable to resist the dark force that shrouds him?

Hahm Yunhee is home. A place of safety. A place of comfort. And yet, a large segment of her heart is missing, left behind in an unreachable world. Park Jimin is trapped in a parallel universe, fighting for survival while striving to find a way back to the woman he lost. Haunted by demons and afraid to face the man she once lived with, Yunhee seeks aid from the lovable rogue, Kim Seokjin, while Jimin takes refuge on Jebu-ri Island, joining forces with his new friends and trusted allies. Two worlds apart, yet never alone, Jimin and Yunhee stop at nothing to find each other, but when the dark obsession of one man threatens to destroy their love, old enemies must put aside their differences and pull together for the greater good.