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.

Hahm Yunhee is nothing special, just an average girl trying to make ends meet. She adores her boyfriend, Kim Taehyung; he's sweet, charismatic and a little bit mysterious, but twelve months into their relationship and things are going down the pan. Park Jimin is stinking rich, arrogant, and a dangerous mob boss with many secrets. Those that know of him keep their mouths shut and steer clear, leaving him and his men to run his exclusive club without interference. But Park Jimin is always watching, especially those that seek to destroy him. Now, Taehyung - an old friend he hasn't seen in years - is back and embezzling money from Jimin's business. When the infamous mob boss decides to take matters into his own hands, he kidnaps Yunhee to demand the debt owed. Little do they know, Jimin and Yunhee's worlds are about to be turned, quite literally, upside down. What happens when the feuding pair are thrown into a world where up is down, black is white, and Taehyung is a man who makes Jimin look like a saint?

Kim Taehyung - Mafia King of Seoul and the most feared man in South Korea - is visiting Moscow for the business deal of a lifetime. What happens when a beautiful woman, who can't take her eyes off him in the hotel bar, follows him back to his room?

Kim Seokjin is in trouble. Again. There's never a dull moment for the adorable man with purple hair, and tonight he's on the run. Follow Jin on his exciting adventure to find out how he came to change his treasured hair from black to lilac.

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?