At the age of 15, Melissa learned that her beloved father was the serial criminal nicknamed "Happy Face". As an adult, she adopted a new name and kept the secret while her father served a life sentence. After a long period without communication, he finally manages to reintegrate his daughter's life. In a fierce battle against time, Melissa must determine whether an innocent man is about to be executed for a crime perpetrated by her father. Gradually, she reveals the influence her father has exerted on the victims' relatives, and is confronted with a challenge to her own identity.