In the not-too-distant future, a young spy named Elísabet Eva is about to discover something that will upend her life.

Elísabet likes to take long solitary walks near the lake. One day, she sees two creatures emerging from the water, half-human, half-swan. She follows them through tangles of thickets into a strange new reality.

Pulled into the monomaniacal, and often violent, quest of the swanfolk, Elísabet finds her own mind increasingly untrustworthy. Soon, she is forced to reckon with the consequences of her involvement with these unusual beings, and a past life she has been trying to evade.