Helena, a forty-year-old woman whom, during a period of crisis, begins to receive anonymous letters from an admirer that watches her daily. Meanwhile, she tries to keep it hidden from her partner, João Pedro. Based on the novel by Czech author Milan Kundera.
A former police detective lands a new job at a secret agency, but soon discovers that not everything is as it seems. Haunted by her past after being removed from her position, Bruna must deal with the challenges of her new job, along with her personal traumas.
