A sudden solar storm renders any electronic equipment around the planet useless. On the same day, a baby girl is found on the mountain near a small village lost in the mountains. Her name is Nina.
Andrea (Riccardo Maria Manera) is a young man who lives with the surprises and hardships of life. He lives with his best friend, seeks to complete his studies and has an ex-girlfriend who plays with him like cat and mouse. When he discovers that he has an incurable disease, the world collapses on him. Can an illness change a person's life... for the better? Thanks to Giulia (Jenny De Nucci), Andrea will understand that the time has come to assume what remains of her own existence.
In a dystopian Rome, a law is enforced which does not allow immigrant families to have more than three children. If a fourth is to be expected, he or she must be born, however, one of them must then be killed, giving the females priority for sacrifice. Zoe, Iris and Clio are three sisters, but one of them will soon be killed. Tria is a tragic story, suspended between life and death, set in the home of a family that has accepted to sacrifice its integrity in order to carve out a place in the world. A dystopian story, yet not so far from what could happen, or what, somewhere else, may have already happened.