Andrea is 13 years old, she spends the summers with her grandmother Gisella in Sardinia, in a small village nestled in the mountains and near the sea. This year, Andrea has grown, or rather, her body has grown and the men have noticed it before her. She clings to her childhood habits and wants to return to Jana's domu, with her friends. But they don't care about those fairy tales anymore, unlike her, they are grown up now. The domu was their secret place and contains a treasure that an inscription prohibits from taking. In fact the domus were ancient tombs which, according to popular tales, house mischievous little fairies born from bees, who will teach women to weave precious fabrics. Meanwhile, Andrea attracts the attention of men and even that of Nicola, her crush. She has her first period and the lights in the house opposite Gisella's come on. A sweet song comes from there; a woman weaves the loom with gold thread. With her, there is also a man. They are Lucia and Massimo. By observing them, Andrea begins to appreciate her new desires and sensations. She finally finds the courage to kiss.Is Lucia a jana?Jana is the story of this summer that we all experienced and that none of us will ever forget.