Stella is a clumsy, cynical, imaginative and tormented teenage girl. After a life-changing car accident involving a dog, she convinces herself she must count her age in dog years: one year of her life counts for seven, and now that she’s turning sixteen, she is a centennial. For this reason, Stella thinks she has not much time left to live and pens a bucket list of all the things she would like to achieve before she dies.

Three well-off young men—former students at Rome’s prestigious all-boys Catholic high school San Leone Magno—brutally tortured, raped, and murdered two young women in 1975. The event, which came to be known as the Circeo massacre, shocked and captivated the country, exposing the violence and dark underbelly of the upper middle class at a moment when the traditional structures of family and religion were seen as under threat.