Filthy is the coming-of-age story of the seventeen year-old Lena. In love with a boy for the first time, Lena longs for freedom and adventure. Her world is shattered instantly when her teacher, whom all her classmates have a crush on, rapes her in her own home. Instead of sharing her trauma, Lena keeps it a secret, even from her best friend. Her pent up feelings drive her to attempt suicide. With her family in shock, Lena ends up in a psychiatric ward.