In the quaint coastal town of Halsoskolan, two siblings, both avid surfers, find themselves in a secretive, intensive surfing school. As they learn to ride the waves, so too do they discover the ebb and flow of their own desires. Their instructor, a mysterious figure who seems to understand their unspoken longings, guides them not just in the art of surfing, but also in the dance of intimacy. As they practice their moves on the beach, the siblings find themselves drawn to each other, their bodies yearning for more than just the thrill of the waves.