Marina Lenk is an experienced Ornamental Jumping athlete. However, an attack of Tinnitus — an unbearable ringing sound in the ears — drags her from the top of her game to the edge of madness.

Guilherme and Sofia, brother and sister, grow up sharing experiences and slowly discovering their sexuality. The thing that Sofia doesn’t know is how far Guilherme will go to keep her inside his own perverse, dark and perfect circle.