São Paulo, 90's. Cláudia, the midle daugther, lives in Lisboa and communicates with her father and two sisters through phone calls. During one of this calls, the family dynamic are unveiled and some secrets are revealed.
In the 80s, two young friends, Rafael and Amanda, decide to call to a telephone conversation service called “Dial Friendship”. There, they discover the story of Shadow, a serial killer who lurks the phonecalls and starts chasing the two friends.
