A teenager is drowning by stress when she recalls killing her stepfather who tried to rape her. Her anxiety rises day by day and she starts seeing him everywhere, without knowing that the hallucination is real and he searches revenge.
Professor Romo, a university psychology teacher, challenges his class to prove a bizarre theory. Among his students is his estranged daughter, Ana Lía. Determined to mend their fractured relationship, he unwittingly sets off a chain of events that only deepens the divide between them.
