A lonely Korean pop star learns her high school classmate died five years ago. So, why are they still texting?

Yubin knows she's different than the other girls in the pop group SIITY. Yes, they all got sucked into the same machine, giving up schooling and signing ridiculously long contracts with no guarantee of success, but that's how Korean stars are made. Yubin is supposed to be thankful for that, but she isn't. She doesn't even like the girls she performs with.

She's more connected to her former schoolmate Jieun, even though all they ever do is text. Over the last two months, Jieun has become her confidant and best friend, connecting Yubin to the real world in a way she desperately needs. Now that SIITY is going to appear on the reality show Incredible Race: Asia, Yubin will need that connection more than ever, which is why she's devastated to discover Jieun has been dead five years and is actually haunting her.

If that weren't enough, Yubin's not the only SIITY member with issues. Rena's father is emotionally abusive. Somi has a learning disability, and after a near death experience, Tae-eun becomes a nine-tailed fox woman. The only way they'll survive the show, each other, and the supernatural currents buffeting them is to work together and win the hearts of their fans. Because if they don't, they have nothing to go back to even if they survive what's trying to kill them.