In a lonely Swiss mountain village, Kira's holiday erupts.
It's winter, it's eerie, and out in the woods something imbeds its claws into her sister.
When Romy returns, she's different.
She's violent, inhuman, and by rights, should be dead.
Even though things aren't normal, all their parents care about is that she's still alive.
In the otherworldly forest, Kira starts to pry, but secrets like to be kept.
With the help of Callum, a sarcastic Scotsman, Kira stumbles upon the folkloric world .