Sarah is stepping away from a dance performance when a phone call from a friend jolts her: the friend insists she has woken up in an unfamiliar place with strange people and cannot recall how she ended up there. Sarah grows upset and urges her friend to try to escape the house.
Some time later, a journey begins toward a Balkan music camp for a few days. As she walks to the campground, she runs into Isolde, and the two of them are very excited to see each other. While brushing their teeth, they catch up on their lives, especially their recent failed romantic relationships. Isolde shares a story about having sex with her masseur at a seedy massage parlor. They attend some of the music classes and meet a few of the other campers. Isolde finds one guy in particular, Steph, to be very annoying, but Sarah thinks he's cute.
That night Steph dances with Steph, but right when they seem to be forming a connection he abruptly leaves. Sarah finds him outside talking to Isolde. On the way back to their cabin, Sarah asks Isolde if she's alright, and how she managed to get out of that strange house she’d awoken in. Isolde immediately changes the subject and tells a dirty joke.
Sarah runs into Steph again the next day, and together they have lunch and attend a music class. At night, Sarah finds Steph and Isolde pretending to fight each other. Isolde gets drunk, and Sarah offers to walk her back to their cabin. They get lost in the woods, which Isolde blames on Sarah, and Isolde storms off into the woods to look for the cabin on her own. The next day Isolde is distant and dismissive. Sarah continues to spend time with Steph, but when she invites him to her cabin, he declines. That night Sarah dreams of Isolde dancing with a group of women in the woods.
Isolde continues to act distant the next day. Sarah talks to one of the teachers about Bulgarian folk lore, and the woman explains that sometimes things that are normally good can become evil if they are inhabited by an evil spirit. During a large group song outside, Sarah and Steph sneak off into the wilderness. They find a spot near the river and begin to make out and undress. Sarah keeps getting distracted by a noise, but Steph laughs it off and says she’s imagining it. She pushes him into the water while they are kissing, and suddenly has a series of quick flashes of visions of her and Isolde. When she comes to, she sees Steph's body lying face-down in the river.
She stumbles back to the cabin, screaming and crying, and walks in on Steph and Isolde having sex. She runs outside, but when she immediately looks in again, Isolde is fast asleep. Isolde comforts her, but soon says she wants to just go back to sleep. Sarah wanders back to the large group song still in progress, and lies down nearby. She soaks in the music and cries.
