A young girl is deprived of her baby: her descent into hell begins. Still in high-school, Agnès leaves her alcoholic father, finds a boyfriend and gets pregnant. Giving birth to a baby boy, deprived of him by her her stepmother, left by her boyfriend, she find shelter by junkies friends and subsequently turns to prostitution under the name Sabine only to become HIV-positive. In her diary, the young woman recounts her fight against the disease without ever sinking into despair.