Jorge Ferreira da Costa

A boy lives with his mother and younger sister. One day, his mother disappears with her lover, leaving the two children alone. António, the older brother, takes care of his sister, Maria da Luz. The little girl is about 10 months old. When she starts walking, their mother reappears with her lover, takes the girl, and leaves the boy behind. António is devastated, as he had been living for several months with a single goal: to protect his sister.

The young and promising genetics researcher Thomas Nielsen will stop at nothing to become the first person to identify the elements in man that trigger aggression. To achieve faster results he performs illegal tests on the convicted mass murderer Iparrah. But when Thomas one day gets caught, he injects the unauthorized test agent itself. This turns out to have unexpected effects ...

Jeanne, her second husband, Michel, and her teen daughter Marie live quietly in the South of France. However, Jeanne's secret past comes back to haunt her.