In Bordeaux, the pediatric doctor Stéphane is a wolf, flirting with many beautiful women. One night, he meets the twelve year-old Eva alone in front of his building and she tells that she had lost her train to Strasburg. Stéphane invites her to spend the night in his apartment and on the next morning, he takes her to the police station. However the girl tells a story about her stepmother and vanishes. Sooner Stéphane discovers that Eva, who is great pianist, was his patient in his father's hospital where he works when she was six and lost her father. Further, she is treating an angioma in her brain and she will be blind if submitted to a surgery.The girl refuses to be fed in the hospital and her grandfather brings her to Stéphane's home to get close to him. Stéphane feels a platonic affection for the girl and researches the healing for her angioma. He discovers that the retired doctor Arnaud had written a thesis with a revolutionary treatment. Meanwhile he has conflictive feelings for her considering their difference of ages.