Its a horror movie. At the beggining there is a birthday party. A boy and sister fight and the boy gets angry (i think he do something to his sister or someone else) and fot that reason he is sent away to some hospital. He later escape and attack and try to kill his sister. At the end we find out that the father was actually the one who got aggresive and blame it on the son.
“Frayed” (2007)?
Yes, thank you soo much
Thank you Bea.
Solved!